With 28mm necks, the bottles are easy to fill and pour and their tamper-proof design keeps contents safe and secure. Available in a range of 13 different capacities from 30ml through 1-liter, all with interchangeable closures, the amber color of these bottles is particularly useful for light-sensitive liquids. Self-adhesive labels adhere readily to the smooth-glass, easy-to-grip surface so contents can be quickly and easily identified. Screw-on plastic closures can be silk screened with a corporate logo or other graphics. Strong and durable enough to withstand frequent handling, even the large 1-liter bottle is easy to pick up and handle because it weighs only 605 grams (1.33 lbs.), has a diameter of only 96.5 mm (3.8-in.) and is 225.1 mm (8.86-in.) tall.