Cartridge for liquid jetting apparatus

A cartridge that is mountable to a liquid jetting apparatus that includes an air supply apparatus that supplies air and a liquid jetting unit that jets liquid, the cartridge comprising:

• a liquid container that contains the liquid, at least a portion of the liquid container being flexible;
• a case that includes the liquid container;
• and
• an air bag that is positioned between an internal wall of the case and the liquid container, at least a portion of which is flexible, and that contacts with the liquid container in a state of being expanded upon being supplied with the air,
• wherein the air bag includes,
• a first bag that is expanded upon being supplied with the air, and
• a second bag that is positioned above the first bag when the cartridge is in use, and is expanded upon being supplied with the air, wherein the first bag and the second bag are fluidly dependent on each other,
• the air bag and the liquid container are aligned in a first direction intersecting an up-down direction when the cartridge is in use, and
• when the cartridge is in use and the cartridge is viewed in the first direction, the first bag is arranged to overlap a lower part of the center in the up-down direction of the liquid container.