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Do Hydro Flask Tumblers Retain Drink Temps Forever? TESTED!
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May 29, 2025
The company claims that the Hydro Flask 22oz and 32oz tumblers can keep cold drinks cold for 24 hours and hot drinks nice and hot for six hours. Really? I was skeptical! To find out the truth, I tested a 32oz HydroFlask tumbler with both iced beverages and boiling water and a temperature probe. Over a few days! And the results? Well... Tech Expert Dave Taylor of https://www.AskDaveTaylor.com/ put on his lab coat (not literally!) and tested out the Hydro Flask tumblers to find out just how well they retain heat and cold. The results were pleasantly surprising... NOTE: Vendor Supplied Product for Video. Learn more at https://www.HydroFlask.com/
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0:00
hydroflax insulate but how well do they
0:02
do it I decided to test it out
0:04
here's how it went Dave Taylor here and
0:13
I am surrounded by our collection of
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Hydra flasks actually that's not true we
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have even more than these but
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nonetheless Hydra flask was super cool
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and sending me one of their big monster
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32 ounce tumblers because I said I know
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you guys have insulative abilities and I
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know what you promised but I want to
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test it out and really find how well
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they insulate so before we go any
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further let me just tell you about it
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this beast is a 32 ounce insulated
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stainless steel tumbler it uses their
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temp shield technology with double wall
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vacuum insulation and it's an 18/8 grade
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stainless steel now one of the great
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things about this is obviously it
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insulates but it also means there's no
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condensation so if it's a hot muggy
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humid day and you have a cold beverage
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in here you won't have all this water
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you won't leave rings on the table and
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everything super nice now it's big 32
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ounces is a lot of beverage that's three
1:12
cans of soda 12 24 36
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well not quite three cans of soda but
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it's a lot of beverage now here's what
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Hydra flask says and I move these other
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ones out of the way just a little bit so
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we have a little space here all right so
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what Hydra flask says is they say that
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this will keep something ice cold for up
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to 24 hours and it will keep it hot for
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up to six hours now hmm I happen to have
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my I grill thermometer and this is
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actually a bluetooth device it's very
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nice I use it for barbecuing it's handy
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and then it pairs with my smart phone
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and it can show me exactly what's
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happening to the temperature and that is
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exactly what we did
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so my methodology was to fill this up
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with whatever temperature liquid and
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then put the lid on and then put the
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probe through the lid and let it sit in
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the middle of the beverage and that was
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it that's all I did and then I just
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watched the clock and I just wrote down
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the
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temperature at various time intervals
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now how did it do well I'm glad you
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asked because here's what happened I
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have all these little notes here so when
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I used ice water and I had a lot of ice
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but I used ice water and it started out
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at any one what's ice water 32 degrees
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right hey good job so it started out at
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32 degrees and 12 hours later it was at
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34 degrees so in 12 hours it barely lost
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any cool at all now hide your flask says
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it lasts 24 hours so what happened then
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so when it was 11 12 13 14 15 so when I
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was let's see 15 hours later it was a 42
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degrees so it did really well for that
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first 11 12 13 hours and then it started
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to warm up and so it was a 42 degrees
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and then at 2 hours later it was a 46
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degrees and finally 24 hours later it
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was at 54 degrees now 54 degrees isn't
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really ice cold compared to 32 degrees
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but I drank the water and it was still
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pleasantly cool after 24 hours of
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sitting in my mug now I did have the lid
3:34
on and the lid also helps with the
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insulation so that I have not used the
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lid it probably would have come to room
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temperature a little faster because
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there's more surface area that's exposed
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but I would have to say that especially
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12 hours later to have it just 2 degrees
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warmer is amazing so what happened when
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it was hot now with hot let me start by
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saying I first started with a benchmark
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of just a regular old mug I don't know
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this is porcelain mug right it's very
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cute and I put water in now one really
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important thing to know is I live at
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altitude I'm at a mile elevation so
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boiling water temperature for us is 200
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degrees not 212 interesting huh so when
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I poured boiling water into this and it
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was a cool mug let me get look at my
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notes then the hottest temperature I
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could get in a
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old mug was 170 degrees so the hot water
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had already lost 30 degrees of
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temperature by the time it actually hit
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the tumbler or mug and actually came up
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to its temperature now of course the
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outside of the mug got hot but holy cow
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these things lose temperature fast so
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the second time I actually warmed the
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mug up by letting it be in boiling water
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for a minute or two and then I poured
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the hot water and in that time the hot
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water was at a hundred and eighty eight
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degrees so that's 18 degrees warmer so
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if you're obsessive with super hot
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liquids then warm your mug up before you
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use it but it loses temperature super
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fast so fast that ten minutes later I
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have lost 18 degrees and 15 minutes
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later I was down to 135 degrees with the
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cold mug on the hot mug it was even more
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dramatic so I started out at a hundred
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and eighty eight degrees and thirty
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minutes later it was down to 120 degrees
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that means that in about 45 to 60
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minutes your boiling water gets to room
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temperature so this is a great example
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of a beverage container where you need
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to drink fast because it ain't going to
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keep it hot at all and everyone that's
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ever had a cup of tea or coffee knows
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exactly what that experience is like so
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by comparison what happened with the
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Hydra flask when I put boiling water in
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this now I didn't pre warm it or
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anything and I can tell you that even
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just by itself with nothing else
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involved the starting temperature for
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boiling water in here was a hundred and
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ninety seven degrees so it was almost
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exactly boiling which was great now how
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did I get the boiling water in I have a
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hot water kettle I got it to where it
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was boiling and then immediately poured
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it in so it's not like I had a five
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minute interval or I was using other
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mechanisms or I was measuring things
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there was nothing to cool it down but
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even just right off the bat this is ten
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approximately ten degrees warmer than
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the hottest I could get into a regular
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mug but what happened after that so
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let's see so at 11:00 p.m. I tried these
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overnight at 11:00 p.m. oh is 197
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degrees that's
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6:00 a.m. the next morning which would
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be seven hours later it was a hundred
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and wait I'm sorry let's see let's see
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at 11:00 p.m. I was 197 degrees at 1:00
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a.m. this is where it was really handy
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to have I grill
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actually plotting all this and here's an
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example of the screen that it shows with
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the data
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fortunately there's no way to compress
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time so that's probably because it's
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really not designed for 12 hours of
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temperatures it's designed for the 10
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minutes it takes for you to cook your
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steak anyway so at 11:00 p.m. was 197
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degrees at 1 a.m. it was a hundred and
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seventy seven so it had lost 20 degrees
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of temperature in two hours at 3 a.m. it
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was 1:55 at 5 a.m. it was still at 140
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and then at 6 a.m. which is 7 hours
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later it was at 132
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so probably 5 a.m. is the critical one
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because that's the 6 hours so 140
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degrees is still pretty darn hot so in
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this case when Hydra flasks says that
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it's hot for up to 6 hours I would say
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that it probably lasts 7 or 8 hours so 6
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hours after I put boiling water in this
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it was still at 140 degrees and that's
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still pretty hot that's hot enough that
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you don't want to just chug it back
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because you will burn your mouth so I
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would say in both cold and hot this was
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a great success
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and I really like Hydra flasks in case
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it's not obvious that we have this wide
8:06
range of different products from them
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and they all have the same
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characteristics of this temp shield
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double wall vacuum insulation and I love
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the idea that I can put in ice tea I
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drink a ton of ice tea now I can put an
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ice tea nice and cold with a lot of ice
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cubes and have it sit ignored for four
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hours and then pick it up again and it's
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still just as cold and the ice is still
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all there that's amazing this is so good
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at insulating that you could put hot
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coffee in on your way to work and then
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go out at lunch time realizing you
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forgot it grab it and it's still too hot
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to drink that is pretty amazing so I
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continue to be a fan of Hydra flasks I
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will encourage you to check them out
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they are pricey but they are
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beautiful products and they have a very
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nice feel to them they're not slippery
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at all there's it's not it's not a rough
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surface but there's a texture to it so
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it actually has a very nice feel in your
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hands
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the 32-ounce might be a smidge big I
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actually prefer the 22 ounce but this
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one was the one they sent and this is
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the one we used for our tests and it's
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big look at that that's a lot of liquid
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capacity oh another thing I want to
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mention is there's no BPA in any of
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their products so that's one big issue
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for people that are health conscious is
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you want to have beverages and
9:25
containers and storage and water bottles
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just stay away from that BPA stuff not
9:30
good okay so now let's just talk about
9:33
the price but before we get to the price
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do me a favor and go ahead and click on
9:37
that subscribe button if you can I
9:39
really appreciate when you subscribe to
9:41
my channel and leave me some feedback
9:43
give me some comments do you have a
9:44
Hydra flask
9:45
do you love it why if you don't have a
9:47
Hydra flask what's stopping you and what
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do you use instead or are you one of
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those old-school mug people and you just
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wonder why your coffee is always cold
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hmm it's a connection there so anyway
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this is the Hydra flask tumbler 32 ounce
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comes in 11 different colors this is
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blueberry and those 11 colors it will
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cost you 3995 the 22 ounce comes in 12
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colors and that one is 29.95 and as you
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can see here there are a lot of really
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nice colors they've done a very nice job
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with their design so I continue to be a
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fan Hydra flask I say check them out and
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this is Dave Taylor and I will catch you
10:30
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