Cartridge

1 . A cartridge comprising:

an absorber capable of absorbing waste ink;

an enclosure that encloses the absorber; and

a casing that stores the absorber enclosed in the enclosure.

2 . The cartridge according to claim 1 , wherein

the casing includes an inner wall portion made of resin and capable of surrounding the absorber enclosed in the enclosure;

the inner wall portion includes longitudinal inner wall portions extending in a longitudinal direction of the casing; longitudinal outer wall portions are provided with gaps with respect to outer surfaces of the longitudinal inner wall portions; and

at least one rib is provided between each of the longitudinal inner wall portions and each of the longitudinal outer wall portions.

3 . The cartridge according to claim 1 , wherein

the casing includes a box including an opening and capable of storing the absorber, and a lid capable of closing the opening of the box;

the lid includes an introduction port through which the waste ink is introducible into an inside of the casing;

a tubular portion extends from a peripheral edge of the introduction port toward the inside of the casing; and

a tip of the tubular portion is located inside the enclosure.

4 . The cartridge according to claim 3 , wherein

the absorber includes an exposed portion exposed from the enclosure; and

the exposed portion is recessed such that the tubular portion of the lid is fitted into the exposed portion.