You are talking about
unused mugs that you purchased with your package. I say you "purchased" them as gifts to be given away.
We have been recipients of such generosity. We woke up at 3 am last December-- I won't bore you with the details--but had a horrendous time all morning long--arriving at WDW around 2 pm. After check-in, I was sitting at a booth in our resort food court just fighting tears (I never cry) and trying to calm down. There was an incredible family from Canada that came over to us and told us they had been watching for a large family to do something nice for. They proceeded to do several nice things for us. (Canadian family--if you are reading this

) I am telling you--they made our day! Actually, they made our week! It was one of the best vacations ever because they sprinkled pixie-dust in the form of kindness and generosity upon us before they flew back to Canada.