I know this is suppose to be brushes for Hydration Water Bladders, but I found a different use for them. We own a camper, and about once a year we need to clean the drip line for the refrigerator. This kit has the perfect long scrub line for the job. Cleans out the hose refigerator hose line, and then we are back in business, no more icky for awhile. The smallest brush has been great for cleaning cake decorating tips. So have fun with this kit, its very strudy and will last you a long time with a little care.