people have probably seen this in other series, but Japan has vending machines that serve both hot and cold drinks. usually there is a red/blue sticker underneath the display that tells you which one (the color difference is intuitive for when you're visiting as a foreigner), but note that the drinks change out seasonally~
Japan loves their vending machines, it's said that there is one vending machine for every 23 people. that's like one vending machine for a medium size classroom.
the canned corn soup shown in this chapter usually has silky mouthfeel, actual kernels and a mild milky sweetness that you can get from sweet corn soup.