In October 2015 I was on my way, with a friend, to a Harvest Sing near Sheffield when I passed a street bric-a-brac sale. Stalls along one side of the street. We looked at each other and our 'bargain hunt' sixth senses forced us to stop and have a bit of a rummage among all the junk on offer. Among the goodies we found this electric hot water bottle and I had to have it, never seen one before and guessed it was a rare survivor. Interesting that it was in the shape of a recognisable item but no water was involved - it could have been any shape but I suppose it would slip inside the bed sheets easily without raising too much of a bump, just like the rubber ones do. It turns out to be a wartime invention, the patent being taken out on February 22nd 1943 by Stanley Spooner Wates and under the title 'Improvements in and relating to electric heating devices applicable for bed-warming and the like'. The seller had cut the original plug off for safety reasons, and didn't then still have it!