Safe & Hygienic: Sturdy silicone ensures food, providing a healthier drinking by growth Soft & Easy to Use: Flexible silicone allows effortless installation and removal without tools, making it ideal for children and elderly users Leak Proof stopper: Crafted from sturdy silicone, these milk bottle stoppers provide an sealed stopper to liquid leakage and keep milk freshness in the fridge User Friendly &: Sturdy silicone materials is, washable, and retains its shape for long term use, reducing waste compared to once-only use caps Generic Fit Design: Compatible for glass milk bottles of various sizes, offering a hassle release sealing solution for home or offices use