Haws 9802 Water Additive Bacteriostatic Preservative 8 oz, 4 per Carton for use in portable eyewash stations. One 8 oz. (236 ml) bottle will preserve 5 to 20 gallons (18.9 to 75.7 L) of potable water for up to four months. Shelf life of 3 years. Four bottles per carton. This solution is in compliance with FDA regulations. Temperature storage requirements; store at 59-86°F.