With a device for closing an opening of a container for cleaning agent or disinfectant, a solution is to be provided which allows immersion of tubes of different sizes into a disinfectant and/or cleaning agent canister through the canister opening without irritant odours. This is achieved in that the device is equipped with a central region (9) which allows an object such as a tube (16) or the like to be passed through, parts (12) of this region (9) being placed in a sealing manner against the inserted object. <IMAGE>
