Because I logged on and see Kim Jong Un is trending (as if we don't have enough rn), I'm sharing my most sensible opinion: BOXED MAC N CHEESE IS A SCAM. You have to provide the butter & milk anyway. The rest of the recipe is shredded cheese and one tsp flour, so what do you get?

shredded cheese lasts in the fridge for a long time, maybe 3 weeks after it's open, longer if not open. so just keep some on hand