The camelbak mini mule hydration pack has grownup featuresmdash15 liters of water a bike tool organizer pocket and zippered compartments for layers and essentialsmdash in a package that fits younger explorers wersquove also added reflective strips and a safety whistle to make kids easy to spot on the trail camelbak mini mule hydration pack features crux delivers 20 more water per sip with an ergonomic handle for easier refilling and an onoff lever that makes it