A self-venting cartridge (10) for dispensing an extrudable fluid such as ink. The cartridge (10) comprises a cylindrical body (12) for holding the fluid and a plunger (18) for forcing the fluid through a nozzle. The cylindrical body (12) is formed of a wound material and lined internally with a liner material that overlaps itself to form a raised area (34) that is slightly thicker than the surrounding area. The plunger (18) comprises a slightly convex surface (36) and a sidewall (40) that forms a snug fit with the cylindrical body (40). The plunger sidewall (40) and raised area (34) define a channel (A) through which air is automatically vented when the plunger (18) is inserted into the fluid-filled cartridge (10).
