Abstract: A bag for installation on a mobile cleaning cart features an open top end at which the bag is arranged for hanging support on the mobile cleaning cart and an openable and closable bottom end facilitating removal of contents from the bag through said bottom end with the top end hanging from the cart. Installed on a cart of known types commonly used in custodial, janitorial, maid or housecleaning services, the bag can be emptied through the selectively openable bottom end of the bag to avoid lifting of the bags contents through the open top end.