I had one of those in the late 80s. It was a Conair lather warmer. Worked for maybe two weeks then stopped. That always irked me, but I must say I did like the warm lather. You couldn't pay me to go back to it now, though. Apparently they still sell them. Amazing!
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I went down a rabbit hole searching for a “reliable” one of these. Turns out it doesn’t exist. I DO like the idea though.