The A466WHCLSL is a 50ml (1.69 oz) white airless jar with a shiny silver collar. This item ships unassembled in two pieces: the jar and the pump with over cap. The jar needs to be filled before assembly. The hole at the bottom allows air to enter so that the plunger can raise as product is dispensed. These jars are great for skin care products and prevent the product from being exposed to light and air, protecting products that contain antioxidants from oxidation.