Refuse to bring your own drinks. If you want to express it euphemistically, you can try it: our store has small profits but quick turnover. Thank you for bringing your own drinks. Thank you for your support and patronage. Or it can be expressed humorously: the brands of drinks prepared by the hotel are complete, only what you want, nothing you can't think of.

For people who do hotel business, the problem of bringing their own drinks is really annoying. It is possible that vegetable rice doesn't make money, but it can get some benefits from drinks. Then we can operate normally. Just say what you want to say, as long as you express it euphemistically. There is no need to rack one's brains too much.