Your perfect companion for nearly half a liter of your favorite hot or cold drinks. With our patented Reverse-Force™ Lid and zero-leak guarantee, you’ll never have to second-guess a sip again. Crafted from durable borosilicate glass and medical-grade silicone, it’s built to last with a comfortable, non-slip grip. Start with the Large Sip Lid for your morning coffee, then switch to the Straw Lid and stainless steel straw for your mid-morning smoothie—effortless sipping, all day long!