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Brumate just launched Era Leakproof Straw Tumblers in 30oz and 40oz. They are totally leakproof (WHAT?) and come in a ton of colors! My favorite is the 40oz in Verbena!
From Brumate:
Introducing the Era Leakproof Straw Tumbler, our Era tumbler is 100% leakproof, and made for stress free sips on the go. It has our fully leakproof Ü-Turn™ lid that works for both cold and carbonated beverages, ColdKey™ metal straw for minimizing the amount of plastic sitting in your water, BevGuard™ technology to keep ice for 24+ hours, and a cup-holder friendly base so you can enjoy 30 or 40oz of your favorite beverage, free of leaks and spills throughout your daily journey.