Not a bad idea, you have to admit. Although pizza tastes good in most conditions, except maybe frozen, I also prefer it to be at least slightly warm.
Thinking about it, somebody should take this idea and create heated mugs. I don’t know how prevalent Christmas markets are in the States. But around here, we have them everywhere. The traditional drink sold at these markets is hot wine punch, based on mostly red wine and spices. I only partake in it occasionally, but it always bothers me that, when you get the mug, the wine is so hot, you can barely drink it andthe mug burns your fingers. Then there’s a brief period when the wine has just the right temperature, not too hot and not too cold. To me, that period usually last for about two small sips. After that, the wine is so cold that it doesn’t taste good anymore. I wonder why there aren’t thermos mugs or something out there. I pay deposit for those cups anyway.