First point: the performance is excellent. I already burned a night with the language of paid tea in the morning. Of course, if there are only half the bottle, it will not keep the heat as long (the liquid heats the air, which séchappe opening) 2: Solid. Carried in a backpack with a lot of business without worries, no scratches or strokes / indentations ... 3: One negative here. If you drink a lot of beverages like tea, coffee, clean the spout almost every day, otherwise it will be stained brown, as if you leave the tea in a cup for a day. The taste will remain after a moment, so to clean with warm water, soap and a brush. If replacement parts are available at Thermos (not yet found the prices on the other hand) 4: Do not transport upside down. I had a few drops in a day, although little, I keep head up.
