Keep your hydration pack bladder clean and germ free with the Nashbar Hydration Cleaning Kit. Kit includes: three uniquely-shaped nylon brushes specifically designed to clean and sanitize any hydration pack bladder non-toxic stainless steel brushes features rounded tips to prevent damage during cleaning two differently-sized drying hangers to fit inside any size bladder that fold to fit then expand to hold the bladder open. Tips for Cleaning: Use the wide-bristled primary brush for cleaning the inside of the bladder. Use the long thin flexible brush for cleaning the inside of the drinking tube. Use the smallest brush to clean bite valves closures or other hard to clean areas. Fold the bladder hanger before inserting it into the opening of the hydration bladder. Then unfold the hanger to hang the bladder while allowing it to dry completely.