Stock number 3CPLB0221KY is a continuous thread 22-400 Black Metal Cap with a Plastisol Liner. The loud “pop” customers hear when they open a container with one of our plastisol liners, tells them the seal hasn’t been broken during shipping. Featuring a smooth top and ridged sides, our plastisol caps are designed to handle hot-fill processes with ease. After the non-removable liner is heated up by the product temperature, a vacuum forms creating an airtight, hermetic seal. If you’re using products not manufactured by Burch Bottle, please request samples to make sure the caps are compatible. For the best fit and a polished look, pair this cap with any of the jars/bottles below.