In a recent post shared to Reddit’s r/CasualUK, site user u/tqmirza shared a picture of what looked like an innocuous shelf label in an Aldi store. But on closer inspection, they say, they realised the labels were different to the ones they expected to see. “Just realised today that these price labels in Aldi are all E-ink displays,” the Redditor wrote. What’s E-ink, and how do the labels wor