Margins for grocers are notoriously thin. So a few supermarkets in the UK are testing (partial firewall) electronic label technology that enables prices to fluctuate at the price of a button. In other words, surge pricing for food. 100 degrees out? Ice cream goes up in price. Freezing cold out? Ramen goes from 25 cents to 50 cents. High as a *%(&#*(#$? Cheetos and Vienna Fingers jump 3x. Just joking about that last part: the tech can't facial scan for bloodshot eyes. Yet. ;)