Every single day, no matter what time, whether it is straight after a meal, in the middle of the night, or immediately as I collect him from school, the first thing J says is "cola, chips".
It has become a habit of his, but it is a real request and not just echolalia.
As his food fads are so severe it would be easy to fall into the trap of just feeding him McDonald's, but this would be detrimental to his physical health, and as he is already a big chap - tall as well as well built ( not fat) and at nearly age 8 he is wearing age 11-12 clothes, so he needs to be kept in shape and healthy.
He also uses the phrase as a wind up. He knows it will get him a response at some point, so will continue to say it, getting louder, changing the tone, becoming upset, or just saying " cola, chips, noooooo" and then laughing hysterically.
I can say no a thousand times and he would still ask.
With me saying no, he enjoys the interaction, however negative it is, and will then continue in his quest for "cola, chips" over and over again.
On the occasions he does get a McDonald's, he will eat his chips as if he had been starved for a century. Fistfuls of chips are shovelled into his mouth and even as he chews one mouthful he has a fistful of the next batch ready to cram in. He would win any food eating championship contest I am sure, even against those American hot dog winners. J would be chip champion extraordinaire and win a Gold for Britain.