Enjoy hands-free hydration no matter what activity you're doing! OGIO's 70 oz Hydration Reservoir is the ideal item if a hydration pack needs a replacement reservoir, or as the source in a pack featuring hydration capabilities. Volume markings are on the front, so you can mix your favorite drink or electrolytes inside. Stay focused on your physical fun, and don't be burdened with carrying a clumsy water bottle. Choose OGIO's 70 oz Hydration Reservoir to serve your hydration needs.