Abstract: A control unit of a liquid consumption apparatus performs determination processing that determines whether or not each of a first housing container and a second housing container is an unsuitable container that does not satisfy a use condition, performs switching decision that decides switching of a supply source that supplies a liquid composition to a liquid consumption unit to the second housing container when the first housing container is determined to be the unsuitable container while the liquid composition is being supplied from the first housing container to the liquid consumption unit, and continues supply of the liquid composition from the first housing container to the liquid consumption unit regardless of whether or not the second housing container is the unsuitable container until when the switching decision is performed while the liquid composition is being supplied from the first housing container to the liquid consumption unit.

Abstract: A control unit of a liquid consumption apparatus performs determination processing that determines whether or not each of a first housing container and a second housing container is an unsuitable container that does not satisfy a use condition, performs switching decision that decides switching of a supply source that supplies a liquid composition to a liquid consumption unit to the second housing container when the first housing container is determined to be the unsuitable container while the liquid composition is being supplied from the first housing container to the liquid consumption unit, and continues supply of the liquid composition from the first housing container to the liquid consumption unit regardless of whether or not the second housing container is the unsuitable container until when the switching decision is performed while the liquid composition is being supplied from the first housing container to the liquid consumption unit.

Abstract: Provided is a technique that can reduce at least one of various inconveniences in a sub-tank, such as stock management being complicated. The sub-tank includes: a consumable article containing portion; a sub-tank-side storage unit; and a case that can be detachably attached to multiple slots in a consumable article consumption apparatus and contains the consumable article containing portion. In a state before the sub-tank is first mounted in the slot, the sub-tank-side storage unit stores a sub-tank-side identifier configured to distinguish from another sub-tank, and in a state after the sub-tank is first mounted in the slot, the sub-tank-side storage unit further stores sub-tank-side consumable article information relating to an attribute of the consumable article replenished in a consumable article containing portion.

Abstract: Provided is a technique that can reduce at least one of various inconveniences in a sub-tank, such as stock management being complicated. The sub-tank includes: a consumable article containing portion; a sub-tank-side storage unit; and a case that can be detachably attached to multiple slots in a consumable article consumption apparatus and contains the consumable article containing portion. In a state before the sub-tank is first mounted in the slot, the sub-tank-side storage unit stores a sub-tank-side identifier configured to distinguish from another sub-tank, and in a state after the sub-tank is first mounted in the slot, the sub-tank-side storage unit further stores sub-tank-side consumable article information relating to an attribute of the consumable article replenished in a consumable article containing portion.