This hot water bottle was designed to lay flat in a bed between the sheets. Its purpose was to warm the bed before use. The bottle was filled with hot water then a stopper was placed in the top to seal it, preventing the water from running out. The inscription on the attached label of this hot water bottle gives both the donor's details and the location of the bottle when it was first displayed at Flagstaff Hill Maritime Village. the "P.M.O." are the initials for the Port Medical Office. The donor's details are also written in pencil on the base of the bottle. In the 16th-century people warmed their beds with the 'bed warmer', which was a long-handled, metal pan filled with hot coals and embers and covered with a lid. The pan was placed between the bedsheets to warm the bed before the person retired to sleep for the night. In the early 19th-century earthenware bed warmers came began to be used for the same purpose. They would be filled with hot water and sealed then often wrapped in fabric. The ceramic material would hold the heat for quite some time, without being too hot for the person in bed to also warm their feet as they went off to sleep. Hot water bottles were later made from glass, copper, brass or tin. Some manufacturers made them into decorative pieces that still had practical use. In 1903 a patent was taken out for the first rubber hot water bottle, invented by Slavoljub Eduard Penkala, a Croatian engineer. This bottle is of historic significance, as an example of personal heating equipment used in the late 19th and early 20th centuries.Hot water bottle, earthenware, pale colour with brown glaze on top over the shoulder and mouth section and clear glaze on the remainder of the sides. The cylindrical bottle tapers to a slightly narrower base. One side of the bottle, about a sixth of the circumference, is flat. The base of the bottle has a handwritten inscription. An inscription was on the paper label originally attached to the bottle. Inscription hand written on base of bottle "Mrs K. Rob _ / Browns Rd / Offic / 3 _ _ 9" Inscription on paper label " "Mrs K Robinson Browns Rd Officer 3809 - Hot water bottle P.M.O." flagstaff hill, warrnambool, shipwrecked-coast, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, domestic item, hot water bottle, heating equipment, ceramic bottle, stoneware bottle, potter, earthenware, personal item, bed warmer, foot warmer, flat-sided hot water bottle, household item, stoneware, clay, ceramic