Inner plug of a container for holding beverage

摘要

A nozzle unit is attached onto the lower side of a bottom plate of a plug body. A fin and a pair of side plates protrude from the nozzle unit. The fin is arranged below and apart from the liquid-passage hole in the bottom plate in horizontal direction. The side plates are arranged in vertical direction, and put the liquid-passage hole and the fin between them. When a hot drink is poured into the container body to increase the inner pressure of the container body, the fin and the side plates can obstruct the exhausting flow rate of the inner pressure so that the inner pressure cannot be exhausted rapidly. When the fin is bent towards the liquid-passage hole due to the increased inner pressure, the inner pressure can be exhausted efficiently according to its magnitude.