Hydro Flask 10oz Rocks & Cover & Bag Brushed Silver Shiny Minimalist Travel Mug 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. Beveled bottom provides the perfect shelf for your pinky finger TempShield™ insulation keeps drinks cold or hot Insulated press-in lid features our Honeycomb™ Insulation Durable 18/8 Pro-Grade Stainless Steel construction BPA-Free and Phthalate-Free