The invention relates to a method of and a device for delivering a predetermined volume of beverage into a thermoplastic container formed from a preform positioned in a mold having an opening opposite an injection head (18), characterized in that the method includes a prior step of exposing the preform to a sterilizing fluid supplied by a first circuit connected to the injection head (18) and a step of injecting, into a recess of the preform, at least some of the beverage supplied by a second circuit connected to the injection head (18) so as to promote expansion of the preform inside the mold, the mold defining the shape of the container.