Max:
Thirsty from the heat, Max wants a cool drink from a cafe. He tries to take the drink out of the cafe's refrigerator. In the refrigerator, the drinks are arranged in a row according to the type. Max, who wants to eat Power-Aid, grabs the drink at the front, but it is not cool. And he knows that the cooler the drink as it goes to the rear in the alignment. So Max had to struggle to get his hands in the refrigerator to get the cooler drink out.
Sally:
Sally is still working at a cafe today. She has a meticulous personality, so the boss asks her to take care of her inventory. Today is the day when she focuses more, especially when new drinks come to the cafe. She needs to put new drinks behind the arrangement. Because she has to sell them first those that don't have long expiration dates. Taking out the all drinks that were in refrigerator and putting them back in order makes it very difficult for her.
Jordan:
As the owner of a cafe, Jordan is very interested in the cafe's finances. In particular, he hates unnecessary consumption and waste. He is so interested in cafes that he watches them by installing CCTV in them. He knows that people try to take cooler drinks out of their refrigerators when the weather gets hot. The problem is that people keep their refrigerators open for a long time to take out cool drinks. He needs a way to save power in the refrigerator by letting people take out cool drinks easily.