Each bag of blue PET rounds comes with natural smooth disc top caps. These bottles are available in three sizes 2oz, 4oz and 8 oz could be perfect for dispensing lotions, shampoos and other beauty products. Each bag of blue PET rounds comes with natural smooth disc top caps. These bottles are available in three sizes 2oz, 4oz and 8 oz could be perfect for dispensing lotions, shampoos and other beauty products.