Want/Need Glass designed by Inna Alesina, dishwasher-safe.
The small hole divides the volume of the glass into two parts: “need” (below the hole) and “want” (above the hole).
“Alesina Design, Inc. shall not be held responsible for ruined clothes as a result of misuse of this product.”
From the comments section at Book of Joe, the final word on this has to be:
According to Aristotle, once your needs are met you should carefully examine your wants so that you can live the best life possible. As in I want to buy this glass but I don’t need it and it won’t improve my life.