A container is provided with a lid having a push-button trigger mechanism that operates both a drink seal for a drinking opening and a vent seal for a vent opening. The trigger translates in a straight line transverse to a longitudinal axis of the container body during the entire movement of the trigger to define a straight-line actuation stroke. The vent opening is initially opened during a first portion of the actuation stroke of the trigger, and the drink opening is initially opened during a second portion of the actuation stroke of the trigger.