This plastic-free and 100% medical grade silicone Big Mouth™ sport top allows a free flow of liquids while eliminating the dreaded ice shift that often results in a soaked shirt or an embarrassing wet spot in your lap! As with all bottles in the Pura offering, the 22-ounce insulated bottle is 100% plastic-free and can be used with any of our silicone lids including our nipples, spouts, straws, and flat lids.