Switserland is a true confederation. It consists of 26 cantons and in most ways each canton is sovereign.

As an example, swiss cantons are considerably more independent from the Swiss Confederacy (i.e. what most people know and call 'Switserland' the entity) than the states of the USA are.

As an example of how far that goes: Switzerland essentially does not have a capital. The cantons usually do, though. Bern is the seat of the Federal Assembly and is usually considered the capital, more because social norms and systems are based on the notion that all countries must have one.

Swiss cantons can work together and often do, but evidently, not on this.