Funny that, my kids are and have the same sort of thing here all the time.
Maybe I'm a bit long in the tooth for these new fangled ideas and TBH they do not look very healthy.
I was going to say a large family sized bag of crisps every Friday at band practice, but realised that Mrs Oz makes me 2 x rounds of sandwiches 5 days a week, so it would have to be the 20 odd slices of bread that goes to make them, wholemeal mind.
My idea of fast food here is an Indian curry...