NOVELTY - A fuel supply containing a fuel for use by a fuel cell comprises an outer casing that encases a fuel compartment containing the fuel, a reactant compartment, and a reaction chamber. The fuel is transported to the reaction chamber and reacts to form reactants comprising hydrogen gas and liquid reactant. The reactants are transported to the reactant compartment where hydrogen gas passes from reactant compartment to fuel cell.    USE - For a fuel cell, i.e. a direct methanol fuel cell or a reformer fuel cell.    ADVANTAGE - The inventive fuel supply containing fuel can be easily inserted into the fuel cell or the electronic device that the fuel cell powers. It is easily replaceable or refillable.    DETAILED DESCRIPTION - A fuel supply containing a fuel for use by a fuel cell comprises an outer casing (12) that encases a fuel compartment (14) containing the fuel, a reactant compartment (16), and a reaction chamber (22). The fuel is transported to the reaction chamber and reacts to form reactants comprising hydrogen gas and liquid reactant. The reactants are transported to the reactant compartment. The reactant compartment retains the liquid reactant. The hydrogen gas passes from the reactant compartment to the fuel cell. INDEPENDENT CLAIMS are also included for:    (1) a method for forming fuel supply for fuel cell, comprising providing an upper layer; forming blister(s) on the upper layer; laminating a backing layer to the upper layer, forming fuel reservoir(s) between the upper and backing layers; and attaching a valve to the at least one blister reservoir; and    (2) a fuel system comprising a fuel supply encased by a sealed bag, where the fuel supply comprises an outer casing containing the fuel, with the fuel in fluid communication with a shut-off valve disposed on the fuel supply.    DESCRIPTION OF DRAWING(S) - The figure is a cross-sectional view of a pressurized fuel cartridge.    Outer casing (12)    Fuel compartment (14)    Reactant compartment (16)    Movable wall (18)    Wiper (20)    Reaction chamber (22)    Pump (24)    Valve (26)    Second pump (28)    Channel (30)