These are various quantities of 4oz Clear PET (Polyethylene Terephthalate) narrow bottles, also known as Cosmo, Bullet, or Imperial 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 or black), or pump sprayer / atomizer attachment.  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.