Abstract: One aspect of the invention provides a lid comprising: a base defining a first orifice; and a sealing member rotatably coupled to the base, the sealing member configured to seal the first orifice when placed in a sealing position. The base and the sealing member include one or more detents configured to releasably hold the sealing member in the sealing position. Still another aspect of the invention provides a container including a mug and a lid configured for releasable coupling with the mug. The lid includes a base defining a first orifice and a sealing member rotatably coupled to the base. The sealing member is configured to seal the first orifice when placed in a sealing position. The base and the sealing member include one or more detents configured to releasably hold the sealing member in the sealing position.