Thermos has long been popular among outdoor enthusiasts, and for good reason. The bottle combines lightness, durability and guaranteed heat retention. The vacuum is formed at a very high temperature in a vacuum oven, using a unique insulation technology. Midnight series products have a patented easy-to-use automatic cap that can be disassembled for washing. The cap closes by itself if the bottle is knocked over or the drinking cup is twisted into place. The smaller bottle is enough for one drink. Thanks to its small size and lightness, the bottle is especially suitable for hikers' backpacks and ski hikers' breaks. Thermos has won numerous tests over the years, the most recent being Retkilehti 12/2016 and Jahdis & Kalas 4/2019. Superior thermal insulation Keeps hot for 24 hours and cold for 24 hours The vacuum remains of high quality for several years Durable full steel inner and outer shell Quick cap, can also be used with a screw cap (sold separately) The inner surface of the bottle i