Quelle est l'origine de la bouillotte ?

Throughout history, people have sought ways to keep warm during long, cold nights. Many of us today have electric blankets in our beds, a new invention that's only about 50 years old. The earliest solution was to sleep as close to the fire as possible. Later, people considered putting heat-generating things in the quilt to warm the quilt. The earliest idea was to take a large hot stone from the fire and put it in the quilt. Kotatsu was invented in the Middle Ages. Put the red-hot coals into the kotatsu, close the lid, and pull the long handle back and forth in the quilt until the quilt is warm. Then came the hot tub. 300 years ago a French bishop used a tin bottle to warm his feet. It was later made of stone. Later, something made of rubber was used. Now also use plastic and found a different hot water bottle than before. It's a large, oblate thing with a concave side that fits comfortably on the belly.