The invention provides an elastomeric expandable container 10 having a first opening 12 adapted to enable the introduction of a comestible fluid 16 under pressure to inflate the same, and a second opening 20 provided in a nipple-like projection 22 extending from said container 10 and adapted for nursing babies, said second opening 20 being closed by valve means 24, and said valve means 24 being opened and closed by the natural nursing actions of the baby to enable fluid 16 to flow under pressure of the inflated container 10 through said nipple 22 and out of the opening 20 thereof.
