Containment body for making a capsule for making beverages and method for making capsules with different quantities of powdered food substance using a single type of containment body

A containment body for making a capsule for making beverages, comprising:

• a bottom wall (3);
• a lateral wall (4) connected to the bottom wall (3) at a peripheral portion of the bottom wall;
• and
• an upper edge (5) connected to the lateral wall (4) on a side opposite to the bottom wall (3) and delimiting an access opening (6) for accessing an inner space (7) of the containment body (1), the inner space (7) being delimited at the bottom by the bottom wall (3) and laterally by the lateral wall (4), in use a powdered food substance for making a beverage and one or more filtering elements being insertable in the inner space (7);
• a central axis of the containment body (1) being identifiable between a central point of the bottom wall (3) and a central point of the access opening (6);
• characterised in that the lateral wall (4), in a zone of the lateral wall closer to the upper edge (5) than to the bottom wall (3), is provided with one or more retaining elements (8) projecting towards the central axis in a plane substantially perpendicular to the central axis, the one or more retaining elements (8) forming between them and the bottom wall (3) an undercut seat (9) relative to the line of extension of the central axis.