A fluid cartridge for storing and dispensing first and second fluids (80, 82), comprising: a first cartridge wall having a first central longitudinal axis and including a first outlet; a second cartridge wall having a second central longitudinal axis and a second outlet, the second cartridge wall coupled with the first cartridge wall in a side-by-side relation such that the second central longitudinal axis is offset laterally from the first central longitudinal axis; a first piston disposed within the first cartridge wall, wherein the first cartridge wall and the first piston define a first fluid chamber for the first fluid; a second piston positioned in the second cartridge wall, wherein the second cartridge wall and the second piston form a second fluid chamber for the second fluid; force applying structure including a coupling portion comprising a cutting element coupled directly or indirectly with the first and second pistons and extending generally between the first and second pistons (52, 54), wherein a force may be applied to the first piston along the first central longitudinal axis to move both the first and second pistons (52, 54) along the respective first and second central longitudinal axes (92, 94) and within the respective first and second fluid chambers (84, 86) as the coupling portion travels within an opening between the first and second fluid chambers (84, 86), thereby dispensing the first and second fluids (80, 82) from the first and second outlets (30a, 32a), a fixed wall disposed between the first fluid chamber and the second fluid chamber and extending parallel to the first and second central longitudinal axes; the cutting element being in form of a blade having a sharpened leading edge and extending across the fixed wall; the cutting element is configured to cut said opening in the fixed wall as the first and second pistons are moved along the first and second central longitudinal axes toward the first and second outlets; characterized in that the blade is embedded within the first and second pistons (52, 54), wherein separate piston elements (57, 59) are formed from a softer plastic material than other piston elements. a first cartridge wall having a first central longitudinal axis and including a first outlet; a second cartridge wall having a second central longitudinal axis and a second outlet, the second cartridge wall coupled with the first cartridge wall in a side-by-side relation such that the second central longitudinal axis is offset laterally from the first central longitudinal axis; a first piston disposed within the first cartridge wall, wherein the first cartridge wall and the first piston define a first fluid chamber for the first fluid; a second piston positioned in the second cartridge wall, wherein the second cartridge wall and the second piston form a second fluid chamber for the second fluid; force applying structure including a coupling portion comprising a cutting element coupled directly or indirectly with the first and second pistons and extending generally between the first and second pistons (52, 54), wherein a force may be applied to the first piston along the first central longitudinal axis to move both the first and second pistons (52, 54) along the respective first and second central longitudinal axes (92, 94) and within the respective first and second fluid chambers (84, 86) as the coupling portion travels within an opening between the first and second fluid chambers (84, 86), thereby dispensing the first and second fluids (80, 82) from the first and second outlets (30a, 32a), a fixed wall disposed between the first fluid chamber and the second fluid chamber and extending parallel to the first and second central longitudinal axes; the cutting element being in form of a blade having a sharpened leading edge and extending across the fixed wall; the cutting element is configured to cut said opening in the fixed wall as the first and second pistons are moved along the first and second central longitudinal axes toward the first and second outlets; characterized in that the blade is embedded within the first and second pistons (52, 54), wherein separate piston elements (57, 59) are formed from a softer plastic material than other piston elements.