FI's cousin is getting married in a month. They already live together and their registry is sparse. They mostly have big ticket items, small cheap items, or items in our price range that I judgingly think are useless.
I'd rather give cash than something they won't end up using, but I feel weird because we are getting married next year and don't want them to feel they have to gift us the same amount.

What should we do?

Hit the enter button too quickly and it wont let me edit the poll.
cash? or registry gift that I dont think they will use?