Why do temples and religious places still use plastic disposables for food?

I’ve been to so many religious places and the prasad and bhandara food is served in plastic bowls, tea in disposable plastic cups, food on those thin plastic-coated plates marked as paper plates. I don't understand but it just feels weird. These are places that talk about purity, respect for nature, living simply… but the trash after every event says otherwise. These places generate a lot of waste daily. Why can’t we use something safer? There are so many better options now. Is it cost? Habit? Or no one thinking about it?