metal or plastic disk round or oval-shaped flat top and bottom ridges around the sides usually embossed with a logo or design a hole or slit in the center for removal
bottlecap which has metal or plastic disk bottlecap which has round or oval-shaped bottlecap which has flat top and bottom bottlecap which has ridges around the sides bottlecap which has usually embossed with a logo or design bottlecap which is a hole or slit in the center for removal