Abstract: A warming apparatus uses shower or bath water to warm a canister, such as a shaving cream canister, to a comfortable temperature while washing or showering. The canister is inserted into a warming chamber which is partially surrounded by a water jacket formed between an inner wall, an outer wall, an upper end plate and a lower end plate. An inlet fitting extends from the water jacket to a water supply line. An outlet fitting extends from the water jacket to a shower head. As shower water flows through the water jacket heat is transferred from the water to the inner wall, and from the inner wall to the warming chamber. The inner wall may be ribbed or finned to increase the surface area of the inner wall within the water jacket. The unit may alternatively be connected into the water line by flexible hoses running from the warming apparatus to a diverter fastened between the pipe and shower head. The warming chamber may include at least one drain hole extending from the warming chamber.