These tumblers are a part of our P.L.A.N. (Peace | Love | And | Nature) series.  Just to remind us that There is No PLANet B.  

Double-Wall Vacuum Insulation Technology

These tumblers utilize double-wall vacuum insulation technology to keep beverages hot or cold for extended periods.

The double-wall vacuum insulation design helps maintain the temperature of your drinks for hours, keeping them hot for 6 hours and cold for 12 hours. The tumblers are suitable for use in any season