A lid to selectively plug or unplug a discharge mouth of a toner container mountable to an image forming apparatus for replenishing a toner. In one embodiment, a lid has a body member having a bottom portion with an opening, a lug member having a body portion having a first end portion, and a base member having an opening. The body portion of the lug member is sized to be received into the opening of the bottom portion of the body member and into the opening of the base member to engage the body member with the base member. The body portion of the lug member is received into the opening of the bottom portion of the body member and into the opening of the base member, the first end portion of the body portion of the lug member snaggingly fits through the opening of the base member.