The packing according to the invention comprises: a container for holding said at least one object to be sterilized, having an inlet opening and a discharge opening via which said at least one object may pass into and out of said container, said container comprising a rigid part which comprises a peripheral wall bored with a multitude of small holes having dimensions smaller than those of the said at least one object, and a non-rigid part in a material porous to the sterilization fluid and non-porous to microbial contamination, this non-rigid part being able to contain said rigid part and to be sealed thereon; and at least one envelope made in a flexible and airtight material, which is vacuum sealing fitted on said container.