Double-shell lightweight thermo-cup with screw cap, which has a flip-off lid operated by a button on the top. The incredibly thin 2mm walls, which are 1/3 thinner than most single-shell plastic bottles, protect the drink warm for 8 hours and cold for 16 hours. Microlite 350 Flip is a thermos suitable for shorter trips. The innovative lid opening system for drinking ensures maximum quick and simple control.