PP made 28 MM WATER BOTTLE CAPs are used for airtight sealing of PET or PE bottles containing cooking oil, hair oil, mineral water, beverages, sauces etc. Injection molded manufacturing method of these colorful caps makes these highly durable and crack proof. Offered 28 MM WATER BOTTLE CAPs have standard internal threading design for air tight sealing of bottles. Plain in appearance, these caps have perfect round shape and flat head design. Ease of handling, crack proof surface and reusable quality are some of the key aspects of these bottle caps.