Oh, tinanam, one more note: For a while the soda (soft drink, pop, carbonated beverage) 7Up was billed as "the uncola." It is completely unlike Coke and Pepsi, both colas, and I think that marketing campaign had quite a lot of success.
I don't know if they still use that line, but it was popular enough that people would still remember it and use that "un" phrase in other application