Designed Specifically for Owala FreeSip: This replacement pack is precisely manufactured for Owala FreeSip's range of stainless steel and plastic water bottles. It is fully compatible with for the 19oz, 24oz, 32oz, and 40oz stainless steel models, as well as the for 25oz Clear Tritan plastic water bottle. Please ensure to verify your bottle model before purchase for smooth fitting. Incredible Leak-proof Design: Each of our replacement stoppers and seals undergo careful engineering and thorough testing to guarantee maximum protection against leakage. With these accessories, you can ensure your water bottle remains clean and leak-free for an enjoyable daily hydration experience. Premium Quality BPA-Free Silicone: . The reliability and durability of our stoppers and seals ensure optimal performance. They are both friendly to hand washing and are dishwasher safe, ensuring a hygienic and convenient user experience. Package Includes All Necessary Items: The abundant quantity ensures that you always have a backup in case of an unexpected need or even for sharing with your friends. Note on Compatibility: Please note that our product set is exclusively compatible for Owala FreeSip 19/24/32/40oz stainless steel thermos bottle for Owala FreeSip 25oz Clear Tritan plastic water bottle only. It does not fit any other brands or sizes of water bottles. Confirm your water bottle model before making a purchase to avoid disappointment. Material: Silica gel colour: gray+white Package Contents: 4 x Replacement Stopper 4 x washer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.