A sealed beverage package including a container with a beverage and an insert
sealed
therein. The insert holds a gas that upon opening the container interacts with
the beverage to produce a froth in the beverage. The insert is designed to float
in the beverage and is sized relative to the container such that it cannot rotate
end-over-end therein. The insert includes a body with at least one fin extending
therefrom. The at least one fin may have the dual functions of securing the insert
in the container above the beverage to facilitate charging the insert with gas,
as well as preventing the insert from exiting the container, once the container
is opened.