A bottle assembly has an open ended container and a vent assembly positionable at least in part on the rim of the container to permit venting of the container during use. The vent assembly generally comprises a vent insert and a receptacle portion releasably connectable to the vent insert. The vent insert includes an annular lip depending longitudinally within the container upon positioning of the vent assembly on the rim of the container. The annular lip has a transversely inner surface having one of a catch and a latch. The receptacle has a top and a vent tube extending downward from the top. The top of the receptacle includes a transversely outer surface having the opposite one of a catch and a latch, with the top of the receptacle being insertable into the annular lip for releasable latch and catch connection of the receptacle to the vent insert. A collar assembly generally defines a closure for the container, with the collar assembly being configured for releasable engagement with the neck of the container over the open end thereof to retain the vent assembly together with the container.
