1. Package Content: You will receive 2 pieces of silicone bite valve replacements, which are ideal mouthpiece replacements for water bottles, allowing you to replace the bite valve of your water bottle and extend its life. 2. Reliable Material: Our water bottle mouthpiece replacements are made of premium silicone material, which are soft and BPA free, reusable, you can buy with confidence. 3. Easy to Use: First you should squeeze out the old spout from the bottom of the cup lid, then align the new spout and insert it from the inside of the cup lid, and finally press the spout hard into the correct position. 4. Compatibility: The size of each spout replacement is approximately 3.82x3.17cm/1.5x1.25in. Before purchasing, please confirm the model size first. These bite valve for Ello Cooper replacement parts Compatible with Ello Cooper stainless steel series water bottle, including for Ello Cooper 18oz, 22oz, 32oz, 40oz stainless steel water bottle. Please note that our product is not sponsored or endorsed by, or affiliated with the s it fits, including Ello Cooper.