Fast Effective Relief For Immediate Emergency Flushing The Easy-to-squeeze Bottle Has A Uniquely Designed Eyecup That Allows The Eye To Be Irrigated Whether The User Is Standing Sitting Or Lying Down A Perforated Plate Breaks Up The Stream Of Water Providing A Gentle Spray Into The Eye Used Eyewash Exits Through A Drain Tube And Is Prevented From Going Back Into The Bottle 16 Oz. (500 Ml)