Systems and methods for determining different fill levels of objects in the containers for disposable and consumable objects are disclosed. A sensor unit can detect presence of an object passing into a waste container and different levels of the objects in the waste container as the objects fill the waste container. When the waste container is full, a notification message may be generated to empty or replace the waste container. The sensor unit can also detect different levels of objects in a consumable container as the objects are removed from the consumable container. When the consumable container is empty, a notification message may be generated to refill or replace the consumable container. In embodiments of the invention, a notification message may also be generated for a predetermined level of objects in the container.