A device for dispensing a formulation of at least two compounds selected from a set of selectable compounds includes a plurality of containers storing the different selectable compounds, a pump associated with each container, a dispensing surface that includes at least two through openings configured to convey at least two selected compounds, a selector configured to connect the at least two through openings to the pumps for the selected compounds and to close the other pumps, and an actuator configured to activate all of the pumps and to only deliver the at least two selected compounds onto the dispensing surface.
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