Whoever convinced you to mix an energy drink into your reservoir owes you a new hydration system, because now your hiking water always has a weird aftertaste. But you could scrub your reservoir and tube down with Hydrapak's Cleaning Kit. This kit includes a flexible wire brush that's long and nimble enough to clean the inside of tubes, and a biodegradable, chlorine-free Bottle Bright cleaning tablet. This all-natural, environmentally safe kit especially comes in handy if you get the inside of your water bottle dirty during backpacking trips.