Every tub on its own bottom suggests that every person or entity in a group should be self-sufficient. This idiom, often abbreviated to ETOB, is common in academic speech to mean that each department or school should be responsible for raising its own funds. But the phrase goes back at least 400 years, when a tub meant the cask or barrel for wine. The metaphor of a tub on its own bottom appears in religious texts from the 1600s, referring to a foundation to which one should adhere. This is part of a complete episode.