Abstract: The present disclosure relates to a food and beverage container device including: a container for storing food and beverage, and a piston unit capable of moving up and down in close contact with the container. The piston unit includes a neck part having a hollow interior and movable up and down. The neck part includes a discharge portion protruding upward from an upper end of the neck part, having a first threaded portion and a first discharge groove on the outer circumferential surface, and discharging food and beverage or air to the inside of the container, a first flow guiding portion formed to be inclined upward in the opposite direction to the first discharge groove at a position spaced apart from the discharge portion, and a first reservoir portion formed between the discharge portion and the first flow guiding portion to hold the discharged food and beverage.