Bottles

In the Isshinryu system their is a story where Tatsuo-san makes a statement that all bottles are good. This is supposedly about how all systems of karate are good. It also speaks to the fact, "techniques are often done differently between practitioners and in general karate as a martial art has many different and correct ways to apply techniques and even many ways that are good to teach, learn and practice the same system, technique and way."

All bottles are good is a metaphor for many things to include that all systems or styles are also good and no one way is superior to another, just different.