King size heating blanket. Wrap myself up like a burrito after work and I'm in heaven. Just wish I'd done it sooner, my last place didn't keep heat in well, but I felt like spending $100~ on a blanket was crazy and was stacking multiple cheap ones to not freeze in my own home.
Faik the worry isn't from wine the emperor drank (though I think the consensus is he did take a hell of a lot of mercury as medicine believing it'd give immortality). It's the described artistic floor map of China (at the time) with the rivers of liquid mercury suggested as being real by the high mercury readings.