Up your hydration game by adding the CamelBak Unbottle 3L Hydration Reservoir to your kit. An insulated sleeve defends your water supply against the external temperatures, and provides attachment points so you can easily strap it to a boat, backpack, pack mule, or wherever else you think you'll need it. External fill means you can open the reservoir without removing the sleeve, and the ergonomic grip lets you easily hold it one handed as you pour.