To prevent and heal rash of a diaper for babies by arranging a hand- held body container, a pump part integrated with a lid and an injection nozzle part with a tip part thereof as a flexible tube.

A body container 1 with the capacity of 400CC or less having a thermometer attached to the side thereof to indicate a water temperature is provided with a pump part 2 which concurrently serves as lid 6 to jet out hot water and a lever 2a to apply a pressure thereto. The pump part 2 has a water absorbing pipe which is made so longer to bend and reach a bottom part of the container and even when the container is inclined and the hot water is left slightly, all the hot water can be sucked up. A long nozzle about 12cm long is bent downward as a whole, a tip opening part thereof with its diameter of about 1.5mm is reduced and at least a part of an injection nozzle part 3 forms a bellow-shaped flexible tube 3a at a part about 3cm from the tip thereof. As a result, the injection nozzle part 3 is freely changeable in the direction of injection. After the use, the body container 1 is preserved in an electrothermal heat reservoir 5 thereby always keeping the hot water inside at a fixed temperature.