Closure assembly for a beverage container and method for repeatably closing a beverage container by means of a closure assembly

A closure assembly for a beverage container comprising:

• a lid comprising an outer side and an inner side, the lid comprising an opening;
• and
• a closure which is arranged on the lid configured for repeatably closing the opening, the closure comprising a base, a tab and a lever,
• wherein the opening in the lid comprises an opening edge,
• wherein the base comprises a frame and a window, the frame positioned along the opening edge, the window passing through the frame;
• wherein the base comprises a flap pivotably connected to the frame, the flap configured to close the window,
• wherein the tab pivots around a first axis of rotation relative to the frame,
• wherein the lever is configured to pivot around a second axis of rotation on the tab and around a third axis of rotation on the flap, and
• wherein the lever connects to other components of the closure assembly only at the tab and the flap.