Cocktail shaker with movable cover

A cocktail shaker comprising:

• a cup for receiving liquid ingredients;
• and
• a lid for installing on the cup, the lid including:
• a base including:
• a top wall;
• an opening in the top wall for dispensing the liquid ingredients out of the cocktail shaker;
• and
• a pressure relief hole in the top wall for releasing air from the cup while dispensing the liquid ingredients out of the cocktail shaker through the opening;
• a cover movably coupled to the base for moving along the top wall between a first orientation in which the cover covers the opening and the pressure relief hole, and a second orientation in which the opening and the pressure relief hole are uncovered;
• and
• an elastic element for biasing the cover into the first orientation, the cover being movable from the first orientation into the second orientation by overcoming the biasing by the elastic element,
• the cup and lid being configured such that a user can grip the cup with one hand and move the cover from the first orientation to the second orientation with an index finger of the one hand.