**color changes from whit to yellow in UV light**
This tumbler is a stainless steel, double wall, vacuum insulated and BPA free. Every stainless steel tumbler is sealed with Epoxy giving it that beautiful, glass-like finish.
Since it is double wall stainless your tumbler can keep hot beverages hot for up to 8 hours and cold beverages for 24 hours.
It's important you care for your tumbler properly. These should only be HAND WASHED , NOT DISHWASHER SAFE- DO NOT MICROWAVE- HANDLE WITH CARE.
Every tumbler is made with so much love so we hope you enjoy it!