CamelBak Reservoir and Water Bottle Cleaning Tablets are self-dissolving and designed to clean CamelBak water bottles and reservoirs to be free of taste, film, or odors. The tabs break in half for use on smaller vessels, and are free from chlorine, phosphate, preservatives, fumes, and fragrances. They're environmentally safe and biodegradable, and not harmful to aquatic environments. CamelBak Reservoir and Water Bottle Cleaning Tablets come in 2 packets of 8 tabs each. Manufacturer model #: 2161001000. Keeps your CamelBak Crux reservoir clean Cleaning tabs for taste-free, odor-free water Tabs are notched to break in half Free from chlorine, phosphate, preservatives, and fragrances Environmentally safe and biodegradable