hot water can

noun1

1. •
   (historical) A can (often with a spout and handle) filled with hot water, used to warm a room, to keep one's feet warm, or to supply water for such things as shaving, washing, etc.

   • The rest of us were glad to creep between blankets, with a mountain of covers on top, and a hot water can inside. What a tale to tell of balmy Florida! — 1889