The capsule has a capsule body with a mixing chamber for receiving a mixing component and mixing fluid and dental preparation by the mixing component. A plunger body displaced in the capsule body delimits the mixing chamber, where the plunger body includes a channel to guide the fluid from a cavity into the mixing chamber and a projection. Another plunger body is displaced in the capsule body relative to the former plunger body, and comprises another cavity receiving the projection of the former plunger body.
