GASOLINE FUEL PACKS NEW AND IMPROVED SPOUTS! ALL ROTOPAX FUEL PACKS ARE NOW SUPPLIED WITH C.A.R.B. / ECO TYPE SPOUTS. Although the government now requires all portable fuel containers including fuel packs be supplied with C.A.R.B/ECO spouts customer feedback has been very positive regarding the new spouts. They do not allow fuel to dispense until you apply light pressure against the tank being filled which eliminates gas spills on your vehicle or machine. All spouts turn around and store inside of the fuel packs.