Device and method for intermixing a mass. The device includes a container and a mixing unit arranged on the container. The mixing unit includes at least one piston that is positioned in the container, and is movable in a linear direction and has at least one mixing element. The mixing element extends around the piston and includes an upper planar surface and an opposed lower planar surface. The mixing element further includes cone-shaped extensions extending from the lower planar surface and conically tapering in the linear direction away from the lower planar surface to an opening at an end of the cone-shaped extensions facing a bottom of the container to facilitate movement of the piston in the linear direction for intermixing the mass.