The present invention provides a lid in combination with a hollow container for receiving a substance through an open end thereof. The lid comprises a body, a device for assisting a user in consumption of a substance at a correct time interval, and an arrangement for securing the body on the open side of the container in a semi-permanent manner. The body defines a substantially planar exterior surface disposed normal to a length of the container when the body is attached to the open end of the container. Additionally, the body defines a peripheral flange depending from the exterior surface. The peripheral flange defines a generally hollow interior of the body. The device for assisting the user in consumption of the substance at a correct time interval is operable and viewable from the exterior surface.