We have friends who have a few smooth round stones they sit under their stove to absorb heat. When they come inside from working in the cold, they grab one and hold it in their hands to warm up. The stones are almost uncomfortably hot and hold their heat for a long time.
I found some massage rocks here: http://www.rubrocks.com/classic-massagestone-sets/intro-massagestone-set.html
Anyone tried using something like this for hand or bed warmers?
I found some massage rocks here: http://www.rubrocks.com/classic-massagestone-sets/intro-massagestone-set.html
Anyone tried using something like this for hand or bed warmers?