These 16 ounce tumblers are the perfect gift for any environmental conscious organization and/or their environmentally conscious customers. But the true beauty of these tumblers is that their liner reacts to the heat of the beverage inside and as they drink their coffee or tea the world design insert slowly disappears.
- Color changing technology induced by heat
- Spill resistant "S" shape lid
- Acrylic shell and stainless steel liner