We all know the moment. You're in the pub. You ask the bar man for a coke. "Sorry, it's Pepsi. Is that ok?" For some, it's a dealbreaker. Ask anyone. On the Coca Cola vs Pepsi debate, we all have a favourite. Even if we don't throw a strop and tell the bar man to leave it, we begrudging sip our Pepsi while wishing it was Coca Cola instead.