20oz sublimation tumbler is made of 304 stainless steels. More durable than other ordinary plastic. 
Double Wall Vacuum Insulated. The double wall vacuum insulated technology will keep your beverages at the ideal temperature throughout the day - hot up to 8 hours and Keep Cold Up to 12 Hours. 
Our tumbler comes with a push-on lid to keep any dust particles getting in and stop spills. Our sublimation cups won't leak!
Each tumbler comes with a straw