Pink, the perfect temperature for chocolate

According to the labels on these bars, the people at Dars have decided that the ideal temperature for enjoying their bitter chocolate is 22º C. In case you aren't carrying a thermometer but you also don't want the disappointment of eating some chocolate that's off temperature, they've thoughtfully equipped each box with a gauge that changes color as a function of the average kinetic energy of the molecules in that circular dot in the upper right-hand corner. The device isn't all that precise but purple is too cold, white is too hot and pink is just right.


These packs are actually both too cold because, being a philistine in such matters, I kept them in fridge. I got the white one to warm up by covering it with my hand.