Premium Material: Our bottle stoppers are made of good-quality silicone, food-contactable, free, sturdy and long-lasting. And the replacement buttons for are made of premium plastic, not easy to break, and suitable for long-time use. Easy to install and dishwasher safe. Package Content: You get 4 pieces of silicone stoppers for 24oz 32oz, 4 springs, 1 screwdriver and 4 pieces of replacement buttons. Sufficient quantity and perfect collocation can meet your needs. Easy to Install Button: , align the seam to pry the old button with screwdriver; then, align the hole location to install spring; next, align the button with the spring and press hard; the installation of button is complete. Compatibility: Our replacement buttons and silicone stoppers are compatible with stainless steel water bottles, and compatible with 19oz 24oz 25oz 32oz 40oz. Please note that our product is not sponsored or endorsed by, or affiliated with the it fits, including . Practicality: After long-time use, the stoppers and bottle buttons occur aging and damage, and lose normal function and making the bottle mouth leak water easily. With matching springs and screwdriver, you can easily replace old and broken accessories, and help restore function., Weight: 0.1543235834 Pounds, Manufacturer: Awwertse