The invention relates to a driven mixer 10 comprising a first chamber 12 configured to store a first component and a second chamber 14 configured to store a second component, the first chamber and the second chamber being connected to each other by a passage16, with the first and second chambers at least in an initial configuration of the driven mixer being separated by a barrier 18, the barrier being arranged to close off a flow path between the first and second chambers, the driven mixer further comprising a mixing member 20, the mixing member being drivable about an axis of rotation A, partly extending into the second chamber and having a coupling section 22 disposed outside the second chamber and configured to be drivingly coupled to a motor, wherein the first chamber has an initial storing capacity in the initial configuration of the driven mixer, wherein the driven mixer is configured to be brought into an activated configuration in which the first chamber has a reduced storing capacity smaller than the initial storing capacity, so that when the driven mixer is brought from the initial configuration into the activated configuration at least part of a content of the first chamber overcomes the barrier and is displaced into the second chamber, and wherein, at least in the initial configuration, the second chamber is arranged between the first chamber and the coupling section of the mixing member with respect to the axis of rotation.
