Hello There, To all which play to buy a thermos with the idea. The thermos bottle Esbit 1 liter is the best I ever had in my hand. The surface is super griffig.Die equipment with two closures is excellent. The second cup has fallen a bit small. But now the most important thing: The keeping warm. I introduced yesterday around 1800 Uhnr boiling water and now open at breakfast the bottle and poured a cup. The water was still so hot that I could not dunk my finger and after 14 hours. That's the best thing I've ever experienced in a thermos.