No matter what I buy, I do a lot of research and buy it. Before buying a thermos, I did research on Stanley's comments and videos, I did the first test with hot water for 25 hours, first I put some hot water into the thermos, left it open for 5 minutes, poured it and put a new 1 liter of hot water into it, My husband didn't really believe it until after 25 hours, I said, 'Come on, hold out your hand and see how the temperature of the water is.’ He laughed and suddenly pulled his outstretched hand and it burned. The result was only 25 hours of warmth. I didn’t need to hold it for 45 hours. The result is obvious. I highly recommend it.

This thermos held ice for 5 days at room temperature (high 70’s). The trick is to pour out the water every day. This was an experiment for just ice storage and nothing else. I needed a makeshift “frig” to store medication that needed to be cold without access to electricity. I am extremely satisfied with the results and highly recommend if this is your purpose.

Another Christmas present of my husbands from my mother. He actually had been wanting this for his hot coffee and tea to be able to take more than just a cup. Plus it stays hot for 8+hrs. It’s the best one of the better ones according to the reviews on Walmart and Amazon. Also if anyone wants to know It’s around $30, I believe. It hasn’t leaked or anything (yet.) He’s only used it once so far. But I will totally update my review at a later time. First impressions though it’s looks to be good and sturdy. Like heavy duty. Not that heavy in weight though so that’s a good thing. I’d recommend on just first time impressions from the one time use.

This is a lifetime product if treated well. Newly purchased, I used this over the past 10 days on some mornings that were 10°f and lower with wind chill. I was doing Watch Duty in an automobile that was running the engine for foot warmth only 1/3rd of the time. I made traditional Hershey's cocoa on the stovetop at 4.30am while I made the hot water in my usual drip coffeemaker to warm the thermos. The cocoa I enjoyed was the same temperature throughout the next 12 hours and a steamy circle was made on the window when I rested in the lid/cup on the dash. I didn't test beyond that because I ran out of cocoa. But, I don't have any doubts. I'm buying another for a friend and will get a another for soup! Will report back when used longer.