Treatment hairbrush

A liquid-reservoir hairbrush adapted for dispersing water-based solutions and other thin and non-viscous liquids over a user's scalp during hair brushing, comprising:

• (a) a hairbrush body having a chamber, wherein the chamber is only partially filled with the at least one absorbent filler unit, and wherein the chamber further comprising a liquid reservoir, and wherein the liquid reservoir is connected with the at least one absorbent filler unit;
• (b) at least one absorbent filler unit adapted to retain liquid which is placed into the chamber;
• and
• (c) a plurality of hairbrush bristles, each having a proximal end and a distal end, the hairbrush bristles being mounted in a vicinity of their proximal ends to the hairbrush body, wherein at least some of the hairbrush bristles comprise:
• an elongate body with at least one bore formed therethrough,
• at least one absorbent feed rod placed into the at least one bore, and
• a nozzle located at the distal end of each hairbrush bristle comprising at least one rotatably mounted roller-ball, wherein the liquid from the at least one absorbent filler unit is supplied through the at least one absorbent feed rod in a direction of the at least one roller-ball, and wherein the liquid will exit the nozzle when the roller-ball makes rolling contact with the user's scalp.