Simple and robust bottle, even if scratched or dented, it can be used without any problems, provided it is used outdoors.
The strap is designed to make it easy to hang the carabina and connects to the lid for easy drinking.
In addition to the stainless steel vacuum insulation structure, the vacuum part is also plated with copper plating to prevent heat transfer due to radiant heat and improve thermal insulation performance.
An experimental result was obtained in which 500 ml of boiling water was kept at 73°C or higher after 6 hours.