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.

Bought this for him to take coffee to work. Stays warm long enough for him to drink it all. screw on lid has not leaked once yet. Attached cup is good size to keep a warm cup. Cleaning is horrible. Mouth needs to be a little bigger. You can barely get a bottle brush in to clean it and its hard to really scrub the bottom because it's too tight at neck and wide at the bottom.

The best thermal bottle overall. I tested liter plus bottles from Stanley, Thermos, Zojirushi, and generic brands from Walmart and Amazon. The generic brands had problems retaining heat and durability. The name brands had various design issues, like being difficult to pour or seal. All except this Stanley bottle, which is great at keeping hot coffee hot for the whole day, and being easy to use.

Realized that we needed a way to have some hot coffee on hand because it was inevitable that the power would go out during the recent storm. So happy that we added two of these to our hurricane supply kit. Stanley goes back many decades and there is a reason this company is still around.
I recommend this product because it does what it says it will do . having hot coffee, didn't make everything OK but it sure didn't make anything worse..