RotopaX are the only EPA and CARB compliant fuel containers available for sale in the United States! This is thanks to a patented three layer root-molding process, along with specially formulated plastic barrier material to meet the Governments new extremely low permeability requirements. RotopaX is an exclusive, modular system that allows you to customize 2 Gallon packs according to your varying needs. It takes only seconds to switch between: Gasoline Water Diesel Kerosene 2-Cycle Emergency Packs First Aid Packs Utility Packs