More preferably the ink reservoir 12 is molded from a material selected from the group consisting of thermoplastic materials including but not limited to polyphenylene oxide/polystyrene alloys, polypropylene, acrylonitrile/butadiene/styrene terpolymers, polystyrene/butadiene alloys or copolymers, polyetherimide, polysulfone, polyesters and the like, having a melting point or softening point above