A system for making beverages includes a capsule and a capsule holder including an annular edge at the top of which there is a projecting annular element and/or respectively an annular seat. The capsule includes a body including a lower wall, a lateral wall and a perimetric edge on which there is an annular groove having a bottom zone and two inner lateral faces, and/or respectively there is an annular tooth having a tip portion and two outer lateral faces. The capsule holder and the capsule can adopt a sealed configuration where the projecting annular element, inserted in the annular groove, is in sealed contact with at least one of the inner lateral faces, and/or respectively the annular seat receives inside it the annular tooth and is in sealed contact with at least one of the outer lateral faces.