Drinks and adventures are even better on the rocks. With our 10 oz Rocks, you can enjoy rum on Mt. Rainier, or bourbon at Big Sur. Plus, TempShield™ double wall vacuum insulation keeps your beverage chilled and your ice from melting. Our 10 oz Rocks was designed with beveled bottom, providing the perfect no-slip shelf for your pinky finger. The 22 oz Tumbler Lid is compatible and comes with your Rocks to help reduce spills at the campsite or in the backyard.