Featuring a double-layer stainless steel structure, the Tsuzumi Bottle offers extended insulation up to around six hours of both hot and cold drinks*. The ergonomic hourglass design, created using advanced metal processing technology, is easy to grip while the compact size is ideal for travel.

*Heat retention effect: 66 degrees (6 hours) Cold retention effect: 8 degrees (6 hours) * Tested at 20 degrees outside air.