When you order food it usually comes with some sort of plastic. If it were Dominoes there would be plastic on the garlic dip/ketchup/brown sauce/BBQ sauce, if it were Mac Donald's the cups would be plastic and maybe if you ordered Wagamama's then the plates that they have are plastic.
Next time you have a takeaway or go to the shops say no to any unnecessary plastic that may come with the meal. Like at Dominoes, do you really need that dip? You could probably make a better one at home! At the shops say no to a plastic bag, don't you have some from last time or a reusable one and if you have forgotten them then there are trolleys and baskets!