Thermos has long been popular among outdoor enthusiasts, and for good reason. The bottle combines lightness, durability and guaranteed heat retention. The vacuum is created at very high temperatures in a vacuum oven, using a unique insulation technology. The Midnight series products feature a patented, easy-to-use automatic cap that can be disassembled for washing. The cap closes automatically if the bottle is tipped over or the drinking cup is twisted into place. Its generous size means you can drink enough even for a longer day trip. Its small size and light weight make the bottle especially suitable for a hiker's backpack and for ski touring breaks. Thermos has won numerous tests over the years, most recently in Retkilehti 12/2016 and Jahdissa & Kalassa 4/2019. Superior thermal insulation performance Keeps hot for 24 hours and cold for 24 hours The vacuum remains high quality for several years Durable all-steel inner and outer shell Quick cap, can also be used with screw cap (sold s