Here "containers" is a general word for bowls, plates, and pots, which people put food or drink into or on. If your language does not have a general word, use the word for "bowls" or "pots." Paul is using this as a metaphor to describe different types of people. (See: [[rc://en/ta/man/jit/figs-metaphor]])
Possible meanings are 1) "special occasions ... ordinary times" or 2) "the kinds of activities people do in public ... the kinds of activities people do in private."