The water trough that Finn drinks from in TFA is colour corrected to look like Coke and has the in-universe logo on the side of it.
Plus, instead of Finn grossing out, he is digitally manipulated so that he gets up and says, “ahh…” from the refreshing taste.
Or, alternatively, change the fountain to a Pepsi fountain, leave his revulsion, and add “sponsored by Coca-Cola” disclaimers all over the start of the movie and end credits.