Formula delivery appliance

A hair coloring appliance, comprising:

• an elongate handle;
• and
• a consumable assembly removably couplable to the handle, the consumable assembly comprising:
• a manifold chamber with a fluid inlet in selective fluid communication with a first formulation fluid source,
• a plurality of outlet nozzles arranged in a row and extending from the manifold chamber and outwardly from an exterior surface of the consumable assembly, wherein each outlet nozzle of the plurality of outlet nozzles comprises an outlet aperture at a distal end of the outlet nozzle, and wherein the outlet nozzle is configured to discharge a first formulation from the manifold chamber through the outlet aperture,
• a plurality of standoff protrusions arranged in at least two rows positioned outward from and in the direction of the row of the plurality of outlet nozzles and arranged along each side of the row of the plurality of outlet nozzles, wherein each row of the at least two rows of the plurality of standoff protrusions are offset from the row of the plurality of outlet nozzles, and
• a distribution protrusion extending into the manifold chamber and configured to direct the flow of the first formulation from the fluid inlet to each of the plurality of outlet nozzles.