I think the most direct way is to refuse to bring breakfast to my colleagues. But you don't want to ruin the relationship with your colleagues, so you can make excuses, such as forgetting to bring it. There are two other methods that are also feasible.

First: cook at home and bring it to the office. You can simply cook some meals at home and then pack them and take them to the office. If your colleague still asks you to bring him food, you can tell him sadly, "Sorry, I am too poor to eat out recently. I will cook for myself in the future, because I am too poor, and he has no reason to ask you to bring him food."

Second: Speak directly in the group or directly in the office. If you want to order takeout, you can ask more colleagues to order together, and then say in the group, "Comrades, forget about today's meal." Then a colleague gives it to you. You can say, "So-and-so colleague is really fast, thank you for your cooperation, and then the colleague will give you the meal fee. If that colleague still won't give it to you, you can directly say in the group, "So-and-so colleague, are you too busy to forget?" "