What is a bottle cap

Caps is sealed bottle with of, according to different of function, has different shape, and different operation method of caps, as mineral water caps is round with twist of, cans caps is ring with pulled of, meat canned caps no fixed shape, tore into what sample is what sample, injection bottle of cover is glass one of, to with wheel in around polished about then with play open of; men are most like of beer bottle of cover is with pry of. Bottle Cap designs, and designers trying to make it more creative, more attractive.