A reusable bottle cap is needed
for repeated use with coolers, pumps, and dispensers, ensuring tightness and hygiene. Unlike disposable caps, it has a valve that prevents water from spilling during installation and transportation, and also allows it to be used many times, saving money and reducing waste. It fits tightly on the neck and does not damage the cooler needle. 
Main purposes and advantages:

    For coolers and pumps: The main purpose is for use with coolers and electric or manual pumps for convenient water collection.
    Reusable: Made of durable food-grade plastic, designed for hundreds of cycles of use, which is economical.
Valve and tightness: It has an internal valve and gasket that ensure tightness, prevent water from spilling during installation and transportation (in an upright position), and protect against dust.
Hygiene: Easy to disassemble and wash, which is important for maintaining cleanliness.
Economy: Replaces the constant purchase of disposable plugs.

Important note:

These plugs are not designed for transporting bottles in a horizontal or inverted position—they may leak. Other, more airtight disposable plugs are used for this purpose.