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Maybe you shouldn’t have filled your reservoir with margarita mix for that last music festival before the pandemic hit, because one year later you can still taste a hint of lime when you’re on the trail. Thankfully, this kit—which includes a brush for the bladder itself and brush for the drinking tube—makes it easy to clean your hydration system. While not exactly expensive at its original price, at 60 percent off the kit now costs only $4 at Backcountry.com and will help you maintain a crucial piece of gear. Now, just use a regular drinking vessel next time you want to party.