The unit is provided with: a body (2) having an opening (3a) that opens out at the top surface, and having formed in the interior thereof a storage portion (4) for contents a lid (10) for opening and closing the opening (3a) a circulation duct (20) which has a ceiling part (21) situated on the lid (10), and a peripheral wall (22) situated on an installation wall comprising a portion of the peripheral wall of the storage portion (4), and from which open an inlet port (21a) and an outlet port (22a) that face the storage portion (4) a blower (25) situated within the peripheral wall (22) and a deodorization device (26) situated within the peripheral wall (22).
