Emergency Drinking Water Germicidal Tablets and Neutralizer are intended for emergency disinfection of drinking water. When used as directed, they make most water bacteriologically suitable for drinking. Not to be used on a continuous basis. For short term or limited emergency use only. Treats up to 25 quarts. Easy to use. No unpleasant taste, Iodine-based compound (no chlorine).Specifications and Features: Intended for emergency disinfection of drinking water; includes Germicidal tablets (50) and Drinking Water Neutralizer tablets (50) Makes questionable water bacteriologically safe to drink, with no iodine taste or color Proven effective against Giardia; treats up to 25 quarts; Iodine-based compound Neutralizer tablets remove iodine taste and color Affordable, essential gear for camping, backpacking, backcountry treks, international travel, and more