Made of food-grade silicone material, safe and cleaning drinking and BPA free. Trusted quality accessories for Brita filter water bottle. Easy to install, just remove the old bite valve from your water bottle, and put on the new bite valve replacement from inside push up to outside. One-piece silicone bite valve self-seals to prevent leaks, precise size design to fit the bottle perfectly. Water bottle mouthpiece replacement compatible with Brita water bottle makes your bottle more long lasting. Widely compatibility, perfect fit for Brita filter water bottles series, including for Brita Stainless Steel Water Filter Bottle 32oz, 20oz and for Brita Plastic Water Filter Bottle 36oz, 26oz. Package List: 4 x Water Bottle Mouthpiece Replacement