Powderkeg LLC Fuel Caddy for Ski-doo 137" Xp, XS, & XM sleds. This 2.75 gal caddy fits under the 146 storage box with the same bulletproof twist-lock latch system. It attaches in under a minute so it's easy to put on for the long haul when you might need the extra fuel. New for 2014 the fuel caddy includes a Stainless Steel snap-in bottle which can be used as a thermos or for fuel adder etc. The caddy can be used on its own as well without the storage box.