Specifically, this additive is designed to be used with any Haws portable eyewash unit One 5 ounces bottle will preserve 5 to 20 gallons of portable water for up to three months Shelf life of 3 years. Four bottles per carton This solution is in compliance with FDA regulations Haws sterile bacteriostatic preservative for use in portable eyewash stations. One 5 ounces. bottle will preserve 5 to 20 gallons of portable water for up to three months. Shelf life of 3 years. Four bottles per carton. This ‘sterile' solution is in compliance with FDA regulations. Temperature storage requirements; store at 36-104 degree F, and use at 59-86 degree F. Specifically, this additive is designed to be used with any Haws portable eyewash unit where the integrity of the water needs to be preserved. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.