Era Flip 30oz is the world’s first 100% leakproof, covered, flip-down, straw tumbler. It has our fully leakproof SlideSeal™ lid that works for both cold and iced carbonated beverages, SoftSip™ silicone straw so every sip feels like a luxury, ColdKey™ metal straw for minimizing the amount of plastic sitting in your water, BevGuard™ technology to keep your drinks cold for 24+ hours, and a cup holder friendly base so you can enjoy your favorite beverages, free of leaks and spills throughout your daily journey. Made for stress-free sips. Era Flip Tumblers are 100% leakproof with cold beverages and carbonated beverages with ice when in the locked position. Not recommended to be used in the locked position with hot beverages. Volume (no lid): 34ozFunctional Volume (with the lid on): 30ozEmpty Weight: 1.31lbs (0.594kg)Max Height: 9.87" (with straw)Max Width: 5.62" (with handle)Min Width: 3" (cup holder friendly) Not recommended for use with hot beverages. Use at least 25% ice with carbonated beverages Warning: Choking Hazard - small parts not for children under 6 years or any individuals who have a tendency to place inedible objects in their mouths. Silicone Tip is removable and may come off if bitten or pulled. Make sure it's securely in place during use.