The invention relates to a pack including a group of stackable containers each of which includes a body, a shoulder, a neck, and a bottom defining a recess shaped so as to receive the neck and at least part of the shoulder of an identical underlying container; and a flexible film enclosing the group of containers, said film having bottom openings aligned with each hollow recess. The film closely fits the base of the containers on a bottom contact area that annularly extends around the bottom openings; and the film further has top openings through which the necks extend, the film closely fitting the shoulders of the containers on a top contact area that annularly extends around the top openings.