Wiktionary
n. 1 A hot water bottle. 2 A hottle.
Usage examples of "hot bottle".
She was also aware-though she didn't mention it-that her little pouch of dirt was acting like a miniature hot bottle, its heat keeping her warm.
A faint smell of warm indiarubber and a molehill in the middle of the bed showed that a hot bottle was found more economical than coal.
She was back in a moment with a hot bottle and poured Lytol a cup of klah.
Cornwallis was shivering, huddled in a chair in his cabin, a thick shawl over his shoulders and another over his knees, and presumably with a hot bottle under his feet.
Then he had cleared the others off a little and picked her up quite easily and carried her up to her bedroom, where he had held her wrist for a minute, counting, then nodded his head, sent Minnie (who was still crying and being generally a nuisance) out of the room to fetch brandy and to heat water for a hot bottle.