SABRE'S Eye Wash Adapter provides a simple solution to turn most water bottles into an eye wash device Insert eye wash adapter into water bottle and twist eye wash adapter onto bottle to create a tight seal Gently squeeze to create a fountain of water to help flush contaminants from eye An ideal addition to any first aid kit! It's a must-have for use during aerosol projector training Eye Wash Adapter works best on water bottles with 3 or more threads. Most brand name water bottles have 3 or more threads (Dasani, Evian, Smart Water, Aquafina, Propel, Etc.)