Our eco-progressive mission leads us to constantly seek  opportunities to increase the usefulness and life span of our  products.  Our 100% medical grade silicone Big Mouth® Sport top eliminates  distracting drinking or lid removal noises of traditional bottles  making them a teacher's favorite!   True to our plastic-free mission, with Pura, you can be sure you are  getting the safest, BPA/BPS-free and NonToxic Certified bottle on  the market.