Charlie Roy,
Duty free purchases must fit into the passenger's one piece of hand luggage. Ryanair makes this clear.
I don't see where it is clear. I saw no mention of duty free.
One belgian beer gift set box with free glass would almost fill Ryanair's carryon dimensions.
The airports wouldn't be so happy to see dutyfree sales plummet. It's one of the only ways they're making money, since half of them are nearly paying Ryanair to fly there.