Non-Tipping 10oz Graphite Rocks Tumblers with Ice Ball Tray - 4 TumblersJust add your favorite cocktail to the Toadfish Rocks tumbler and keep your drink accident-free and always chilled. Includes built-in graduated measurements for the perfect pour and a shatter-proof lid with a removable slider. This is your new go-to companion from bourbon to coffee. The Toadfish Rocks Tumblers hold on when others can't. Includes Rocks Ice Ball Tray that creates 6 slow-melt ice spheres that are the perfect companion for any cocktail.Toadfish Model Number: TFROCKSSET-4XGRAPH+TRAYFeatures:Color: Graphite Dishwasher safeSmartGrip Technology - Patented SmartGrip technology makes it hard to tip but easy to lift.Double-Wall Vacuum Insulation - Keeps your drinks cold until the last sip.Stainless Steel - Made with high-grade stainless steel, making them puncture & rust-resistant. Graduated Measurements - Built-in graduated measurements so you get a perfect size to pour every time. Ice Ball Tray - Made from food-grade silicone that flexes to easily push & release the ice.Shatterproof Lid - Durable lid with an easy-slide tab will keep your drink safe and easy to sip.Products Included: (4) Non-Tipping Rocks Tumblers (graphite)(1) Ice Ball Tray (6 slow-melt ice spheres)How to Use: To use simply place the Rocks Tumbler on any smooth surface and it will keep your drink in place (securely up-right).To remove, lift directly up.