Its anything.I didn't know that. So you can shop them for giving you diet tat if you've asked for proper full fat stuff? Or is it just Coke/Pepsi swapping?
Imagine asking for an expensive glass of wine from the wine menu and they chuck a cheap Malbec at you..
Coke and Pepsi is a pain and probably at the lower end of the spectrum. When we get asked for a JD and coke we have to say "its Pepsi is that ok?"
But full fat and diet is a bigger issue as some people are hyper sensitive to artificial sweeteners