Coghlan's Drinking Water Treatment, Two Step 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