A lid for a beverage container including a lid body defining a drinking passageway extending between a drinking opening at an upper rim of the lid body and a drinking passageway inlet at an interior of the lid body. The lid includes an actuator accessible from an exterior of the lid body and a sealing apparatus coupled to the actuator and located at least partially in an interior of the lid body. The actuator and the sealing apparatus can slide relative to the lid body between a sealed position and an unsealed position. In the sealed position a sealing member of the sealing apparatus contacts an interior surface of the lid body around the drinking passageway inlet to seal the drinking passageway.