Wholesale 13mm matte black plastic ring rubber head glass dropper for custom dropper bottles . plastic dropper used for dispensing small amounts of liquid.size:13 mm,Material: silicone + plastic + glass, Surface: matte,Glass Tube Dropper consists of a glass tube and a bulb . To use the plastic dropper, the bulb is squeezed, and the tip is placed into the liquid. When the bulb is released, It sucks up the liquid, which draws the liquid into the dropper. The Plastic Medicine Dropper can then be used to dispense small amounts of the liquid precisely. Plastic dropper is commonly used in essential oil packaging. Product Details