Imagine someone getting something that you said you're heavily cutting back on several times. Like it's only been the past 8 months since I seriously cut back on cola and drank with straws... -_-
lol tbf this happens to my lactose-intolerant mom a lot (she brings her own food to gatherings because everything is likely to have milk or cheese in it). I think people won't remember everyone's dietary needs, so it should be up to you to discard stuff you can't have and get yourself stuff you can