Rotopax fuel containers allow you to bring more gas on your backcountry missions. The 1 Gallon Tank fits perfectly on the inside or outside of the Big Days Chase Rack risers, and attaches easily to the Molle panel using the Rotopax mounts. Want more storage? Check out the 2 and 4 gallon options, perfect to pair with the Big Days Headache Rack. CARB/EPA 50 State Compliant Fuel Container with a 10 Year Leak Free Guarantee. Fulfilled by Rotopax in Utah.