When I walk to class in the mornings, I usually see someone or other carrying four or eight orders of drinks using coffee carrying trays. I’m constantly impressed with how simple the design is and yet how useful it is. Without these trays, at most people could probably carry three drinks safely in their arms, and would have had to run back and forth from the office to the drink place to deliver all the drinks. Now, people can be more time efficient and stack the trays with drinks on each other and bring back 8, 12, 16, maybe more drinks in  just one trip. The other great thing about the trays is that they are usually compostable.