The Genroku era in Japan already had a tradition of heating appliances ● hottie "Zukansokunetsu" type of heater. Body size: about 23 x 31 x 5 cm. Capacity: about 2.5L. Country of origin: Japan. Body weight: about 700g.
I used the Maruka YUTANPO right on the day it arrived, filling it from the tap. It has a good shape and keeps its heat well, also thanks to its fluffy warm bag it comes with. It's clearly of great quality and even comes with a spare gasket for the lid. I am looking forward to using it this winter. I recommend this hot water bottle/body warming tool!