Check the listing for details. Clear PET 4 oz Plastic Cosmo Round Bottles-Disc Cap,Pump Spray/Atomizer,& others. Color: Clear, Condition: New. Listed at 9.99 USD. These are various quantities of 4oz Clear PET (Polyethylene Terephthalate) narrow bottles, also known as Cosmo Rounds, Bullet Rounds, Imperial Rounds, or Jefferson Rounds. They are clear or transparent in color, 120ml or 4 oz capacity, and each one comes with either a screw-on cap, a disc top dispensing lid (metallized gold, white, natural, or black), black snap-top or flip-top dispensing cap, or fine mist pump sprayer / atomizer attachment (black or white). The neck size of the bottles is 20-410. These are great to hold hand sanitizer, cosmetic products, and many other liquids.. Their small size makes them particularly convenient for travel. Orders will be shipped in a padded bubble mailer through USPS First Class and USPS First Class International. Please let us know if you have any questions.