A fluid cartridge for storing and dispensing first and second fluids (142, 144), 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; first and second collapsible containers (138, 140) respectively holding the first and second fluids (142, 144) and positioned in the first and second fluid chambers (124, 126); force applying structure including a coupling portion extending generally between the first and second pistons (132, 134), wherein a force may be applied to the first piston along the first central longitudinal axis to move both the first and second pistons (132, 134) along the respective first and second central longitudinal axes (92, 94) and within the respective first and second fluid chambers (124, 126) as the coupling portion travels within an opening between the first and second fluid chambers (124, 126), thereby dispensing the first and second fluids (142, 144) from the first and second outlets (30a, 32a); and a slot positioned between the first and second fluid chambers (124, 126), and extending along the first and second central longitudinal axes (92, 94), the coupling portion riding in the slot as the first and second pistons (132, 134) are moved along the first and second central longitudinal axes (92, 94) toward the first and second outlets (30a, 32a); characterized in that each fluid chamber (124, 126) includes a blade element (160, 162) mounted therein and engageable with the respective collapsible container (138, 140); and each blade element (160, 162) is configured to cut a respective collapsible container (138, 140) as pressure is applied to the first piston and in that distal portions (132a, 134a) of each piston (132, 134) receive and, preferably, couple with proximal portions (138a, 140a) of the respective collapsible container (138. 140) such that, at the end of the dispensing process, each collapsible container (138, 140) is fully collapsed within the respective fluid chamber (124, 126). 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; first and second collapsible containers (138, 140) respectively holding the first and second fluids (142, 144) and positioned in the first and second fluid chambers (124, 126); force applying structure including a coupling portion extending generally between the first and second pistons (132, 134), wherein a force may be applied to the first piston along the first central longitudinal axis to move both the first and second pistons (132, 134) along the respective first and second central longitudinal axes (92, 94) and within the respective first and second fluid chambers (124, 126) as the coupling portion travels within an opening between the first and second fluid chambers (124, 126), thereby dispensing the first and second fluids (142, 144) from the first and second outlets (30a, 32a); and a slot positioned between the first and second fluid chambers (124, 126), and extending along the first and second central longitudinal axes (92, 94), the coupling portion riding in the slot as the first and second pistons (132, 134) are moved along the first and second central longitudinal axes (92, 94) toward the first and second outlets (30a, 32a); characterized in that each fluid chamber (124, 126) includes a blade element (160, 162) mounted therein and engageable with the respective collapsible container (138, 140); and each blade element (160, 162) is configured to cut a respective collapsible container (138, 140) as pressure is applied to the first piston and in that distal portions (132a, 134a) of each piston (132, 134) receive and, preferably, couple with proximal portions (138a, 140a) of the respective collapsible container (138. 140) such that, at the end of the dispensing process, each collapsible container (138, 140) is fully collapsed within the respective fluid chamber (124, 126).