Cartridge and printing system

A cartridge configured to be detachably mounted into a cartridge mounting portion of a printing apparatus having a liquid inlet portion configured to receive a liquid, the cartridge comprising:

• a liquid containing portion containing the liquid and having a containing portion front wall located on an insertion direction side, an insertion direction being a direction in which the cartridge is inserted into the cartridge mounting portion, a containing portion rear wall facing the containing portion front wall, and a containing portion bottom wall intersecting the containing portion front wall and the containing portion rear wall;
• a liquid flowing-in port formed in the containing portion bottom wall;
• and
• a liquid supply portion via which the liquid of the liquid containing portion is supplied to the liquid inlet portion, wherein
• the liquid supply portion is coupled to the liquid inlet portion due to rotational movement of a rear-wall side, which is closer to the containing portion rear wall, of the cartridge downward around a rotation fulcrum, which is located on the insertion direction side, of the cartridge mounting portion, and
• in the insertion direction, a first distance between the liquid flowing-in port and a rear wall inner surface, which is an inner surface of the containing portion rear wall, is shorter than a second distance between the liquid flowing-in port and a front wall inner surface, which is the inner surface of the containing portion front wall.