Made from TITAN Fuel Tanks' famous military-grade, cross-linked polymer that is tougher than steel and longer lasting than aluminum, the Travel Trekker 50 Gallon in-bed Auxiliary Fuel System is the best option in auxiliary fuel systems. TITAN Fuel Tanks routinely tests their tanks using state-of-the-art computer simulations; and performs physical drop tests. TITAN Fuel Tanks will fill their tanks completely and drop them 30 feet onto a steel plate, never losing a drop of liquid. Each tank includes a lifetime warranty due to its proven durability.