Don't drink mold
This kit helps you clean your hydration bladder. The brushes are the right size, and the drying hanger thing is the only reliable way I've found to hold the bladder open so it can dry. Drying is the most important part; if it's wet inside while you're not using it, that's when the mold starts growing. Wish it came with more than 2 cleaning pellet things, although I'm sure regular dish soap works fine too.