How do couples split or manage food expenses?

By feel, agar agar, each take turns to dabao and pay. When in restaurants, depends with which extended family. Because we seldom dine out that often, these are occasional. You treat me, I treat you, relationship grow better.

Groceries - from joint account

Eating out - charge those that can pay via credit cards to joint account credit card

Other small eats - whoever can pay. Doesn't matter