Use our Hiiooweiyi set of snap on bottle caps to provide a safe, convenient and reusable sealing solution for your beloved glass milk or beverage bottles. 1. This 12 piece bottle cap is designed specifically for a 48mm bottle mouth, with precise dimensions ensuring a tight and secure fit every time, effectively locking in freshness and preventing accidental spills. 2. The food grade white plastic material is sturdy, reliable and durable, perfectly integrating into the minimalist aesthetics of modern kitchens. 3. Whether used to store leftover milk, homemade iced tea, cold brew coffee or repurposing old bottles as storage tanks, this bottle cap can easily handle it. 4. Say goodbye to old lids that are difficult to tighten or easy to lose and upgrade your daily storage experience.