Package Content: You will receive 2 silicone bite valves replacement with ideal mouthpiece backups for water bottles, so you can change the biting valve of your water bottle and extend the life. Trusted Material: Water bottle mouthpiece reserves, soft and BPA , reusable, made of first class silicone material that you can buy ly. Easy to use: First you should squeeze it under the old cup cover, then align the mouth and place it through the cup lid and finally press the mouth hard. Compliance: The size of each mouthwash is approximately 3,82x3,17 cm / 1.5x1.25 inch. Please confirm the model size first before purchasing. For Ello Cooper spare parts, this biting valve, Ello Cooper 18oz, 22oz, 32oz, 40oz stainless steel water bottle, including Ello Cooper stainless steel series is compatible with water bottles. Please note that our product is not supported by the brands it fits, including ELLO Cooper, is not approved, or that it is not related to them. Friendly suggestion: It is recommended to change the mouthpiece backup of the Ello Cooper water bottle every three months to ensure that your bottle is always in the position.Note:1. Please allow 13 mm error due to manual measurement and 13g weight error make sure you don't mind before ordering.2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you!About Shipping:1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly.2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 812 days then. The specific delivery time is depend on circumstances.3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hoursHope you have a pleasant shopping experience!