Abstract: An improved fluid dispenser for a shower bath is disclosed for mounting between a pressurized water pipe and a shower nozzle. The dispenser includes a body portion having a water channel connected between the pipe and the nozzle and a dispensing channel opening into the water channel at a lower end thereof and opening onto an upper surface of the body at an upper end thereof above the water channel. A fluid reservoir is mounted on top of the upper surface of the body, having a drain opening into the dispensing channel, for storing the fluid to be dispensed. A valve seat composed of a high lubricity fluorocarbon resin is mounted in the dispensing channel, having a hole therethrough communicating between the upper end of the dispensing channel and a lower surface of the valve seat. A cylindrical valve composed of a high lubricity fluorocarbon resin is rotatably mounted horizontally in the body with a circumferential surface in sealable contact with the lower surface of the valve seat.