we can try this: our store has a small profit, and we refuse to bring our own drinks. Thank you for your support and patronage. It can also be expressed humorously: our store prepares drinks with complete brands, only what you want, nothing you can't think of.

For business people, the problem of bringing your own drinks is really annoying. It is possible that vegetable rice does not earn money, but it can gain 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 your brains too much.