PLASTIC FREE DESIGN: Bottle lid silicone made from medical grade material with no plastic parts. This non plastic spout lid for water bottle provides a clean drinking surface for daily hydration. FITS PURA BOTTLES: Designed as a silicone lid for water bottle use with all Pura sport and juvenile bottles. Easily swap tops to extend bottle use as children grow. FREE FLOW SPOUT: Wide mouth bottle tops rust free and built for active use. The free flowing spout delivers steady hydration while the secure seal helps prevent leaks on the go. LEAK RESISTANT SEAL: Engineered as one of the universal leak proof glass water bottle replacement lids for compatible Pura models. Helps reduce spills in backpacks and lunch bags. VERSATILE FOR ALL AGES: Ideal for school age kids, teens, and adults. Converts standard or insulated bottles into a sport ready design suited for travel, sports, and everyday use. The Pura Sport collection of water bottles is designed for active lifestyles, featuring our patented, medical grade silicone Big Mouth sport top for reliable performance. This bottle lid silicone design delivers a free flow of liquids when open and a secure, leak proof seal when closed, making it ideal for workouts, travel, and everyday hydration. The non plastic spout lid for water bottle use provides a durable, dependable alternative to traditional plastic caps, while the wide mouth bottle top is rust free and built for long lasting use. Available in a variety of colors, the Big Mouth sport top functions as a silicone lid for water bottle models across the entire Pura line, from 5 oz. to 28 oz., insulated or non insulated. Its universal fit makes it a practical choice when looking for universal leak proof glass water bottle replacement lids within the Pura system. Dishwasher safe and made from high quality silicone, this round sport cap is easy to clean and maintain. With Pura, you can feel confident choosing thoughtfully designed drinking products that support a One Life One Bottle approach to hydration.