A new Era of straw tumbler is here. Our Era tumbler is totally leakproof, and made for stress free sips on the go. It has our fully leakproof U-Turn(TM) lid that works for both cold and carbonated beverages, ColdKey(TM) metal straw for minimizing the amount of plastic sitting in your water, BevGuard(TM) technology to keep ice for 24+ hours, and a cup-holder friendly base so you can enjoy 40oz of your favorite beverage, free of leaks and spills throughout your daily journey. | Brumate 40oz Era Leakproof Straw Tumbler in Blue | Size 40 oz