Do not keep my drink hot for 4+ hours
354727
Simple hike - 4+ hours; pre-heated thermos do not keep coffee hot - barely warm;
Second attempt - thermos was covered in poly sleeve; same story
Thermos does keep drink sealed; even when carried in backpack horizontally; but temperature wize - not as was promised

It could be that the reason is size/volume of this unit (0.5L); I use 1.0L old unit with no issues;
4161093
This was suppose to be a great cup that kept warm drinks warm for up to 7 hours.  It doesn't keep it warm for even one hour, so it's useless for the purpose for which I bought it.  Occasionally, I use it when I know I'm going to be using it for 30 minutes or less.  I have cups that cost $2 that keep my drink warm longer than this one does.  I like the way the lid cleans, but since it is useless to me, that doesn't carry much weight.  I bought it used from a highly recommended seller who said it was actually new, so I guess I can't return it. With the recommendations this cup had, I'm wondering if it's defective.
3013211
Great mug but false but false advertising.  The mug claims that it keeps drinks hot for 5 hours which I got more than 5 almost 10. Keeps drinks cold for 9 hours which I got. Easy to clean lid is a bit of a hassle  to clean. The mug says leake proof but that is false advertising.  I put some soda in there and an hour later the mug is very leaky. I know there a piece of paper in there when you buy the mug that says carbonated beverages might cause thug to leake. If there that piece of paper in there than they shouldn't  say it leake proof. When they said leake proof I thought they enter I could put any kind of beverage  in the mug and not a sing drip will ever come out no matter how hard I shoke it or what angle the mug was facing. The push to drink button can be hard to press at times. The lid is top rack dishwasher safe. My contigo autoseal  it truly  leake proof, works for any beverage but doesn't  keep things as hot or cold as this mug. Definitely  a great mug for coffee  or tea. The white lid is easier to see the drinking holes than the black lid but easy  to stain and a bit hard to keep clean. It the long run the lid and the seals will definitely  retain some kind of smell like coffee creamer or something. Same thing happened  to my Thermos Stainless king mug which is exactly  like this mug except for how you take a sipp. Disspointed that Thermos said that the Sipp mug is leake proof when not. I bought this mug thinking I could put any kind of drink and it would be spill free. Got a few soda drops on my pants. When the mug is leaking mug gets very sticky. Might have to look for a new mug for cold drinks but will still use this one for hot drinks, no problems for hot beverages on cold ones tend to leake at time.
10113
I bought this and it doesnt really keep the drink hot. Dont buy,  serious. I got one from the thrift store it costed me only 99 cents its much better quailty than this One , its brand new. I wish i can return this one, but its to laate.
911409
I was really hoping this would keep my coffee warm for 5 hours like it states in the product description.  Unfortunately it only keeps my coffee warm for about 3 hours. I mean luke warm not warm by the third hour.  I am very disappointed and in search of a new coffee mug that will actually keep my coffee "warm" for 5 hours.
4971909
This thermos works and keeps your drink hot for 6+ hours and its sleek. HOWEVER I spilled SO many times I had to return it, you will want to leave it open when your drinking, not only to let the drink cool, but to not make the "pop" sound over and over when opening and closing the top. Then if you forget its open, youll leave it open. I had 5 spills the first month of owning it.
3330675
If you are going to take coffee to work, consider something else. My coffee gets cool in 30 minutes. and this mug will not fit in your car's cup holder.
1940389
Do not buy this mug if you expect hot coffee for 4 hrs maybe 2 hrs tops, plus rubber is loose and ill fitting. Purchased this mug to replace a 20 year old excellent mug which stll work quite well but is beat up and doesn't have no spill feature. Ordered this mug in late December arrived mid March, at this point wish I had cancelled order.
2799896
I am disappointed in this product. Based on the reviews, I thought my coffee would stay hot for at least 2 hours and that this mug was leak-free. That's not the case. My coffee is cold after an hour and if not upright, coffee leaks out of the mug (top is on securely). I would return the item, but the return window has ended. I like the color of the mug though and it's sturdy!
1126991
Preheat it with boiling water, like the instructions say, and your beverage will stay hot longer. I did have to tighten the bottom a little when I received it. I gave one as a gift.
1258109
This thing would be so cool.... except, it won't keep contents hot for more than 30 min and for herbal teas, sometimes you want to steep for way longer than this thing allows. My wife abandoned it and went back to a standard water heater.
3020836
This product DOES NOT keep liquids hot, even if it is filled with hot water for 5 minutes as recommended. I have an older Thermos with a glass interior (and a slightly rusty exterior) and it truly works. This product does not!

DO NOT BELIEVE THIS FALSE STATEMENT: "The Thermax vacuum insulation virtually eliminates temperature change by creating an airless vacuum space between two stainless steel walls. The result is an insulation layer that performs better than any other." Utter BS!
1123443
It's been 4 hours since I filled this with coffee, and my coffee is still almost too hot to drink. It's almost annoying how awesome this Thermos Mug really is!  I definitely recommend it for anyone who doesn't like to have to keep re-heating their coffee every 15 minutes.
2923975
Keeps drinks warm for several hours, cold for 9 or more.
1070489
012914 Update: I then returned the product and the customer support contacted and sent out a replacement to me

I LOVE IT!!!
I tried 90 deg C hot water and left the mug on the table, after 3.5 hours, the water still so hot that I burned my lip....
I then put a full glass of ice into the mug and left it over night, after 14+ hours, half of the mug still have solid ice left inside.
I then tried with 90 deg C of hot coffee and drank a sip every 10 min or so.  The coffee temperature did drop at around the 3rd hour, however still hot enough for me to enjoy.  By the 3.5 hour, the coffee temperature became room temperature.

011514 Update: I tried the cold drink with half cup of ice, within 3 hours, all ice melted away.... 4 hours --> room temp.

010714 Original Post: This product is certainly not as good as advertised!

Reading all the great reviews, I finally decided to get one.
Hot coffee only last about 1 hour, in less than 1.5 hours ---> room temp.
Not worth the buy!!!
4593647
I recently lost my Contigo mug like this and started using a random back-up mug I already had laying around the kitchen. After a few days, I noticed that I'd finished my coffee hours earlier than usual every single morning with the back-up mug. Normally I sip on my coffee until it's nearly lunchtime, but now I was finishing it on my morning commute.

The next morning I was thinking about this and realized exactly what the cause was: My Contigo mug kept my coffee so hot that I could not take big gulps of it and it took me until 11 am to get through it. The back-up mug cooled so quickly that I was gulping my coffee by the time I got in the car.

After less than a week I ordered a new Contigo and I will be a customer for life now.

This mug will keep your coffee pipingly, tongue-burningly hot for hours when sealed. Like others have said, I actually leave the lid off for a couple of minutes after I pour and blow on it to bring it down to a drinkable temperature because I know once I seal the lid it's staying that hot. The more of the coffee you drink the more it will start to lose its heat (because you're replacing hot coffee with room-temperature air with every sip, which is cooling the remaining coffee). But the cooling happens slowly enough that the only time the liquid inside of it really gets *cold* is when the cup is less than half full and the snap lid is open, which is letting a lot of air circulate inside the cup. If you leave it full, it will stay *hot*--not warm--for 7 hours.
2228745
They are beautiful and keep drinks cold longer than a glass vessel, but not nearly as long as their post suggests.  A half hour maybe, but four hours?  No.