Wedding guest gift??

Hey! This is my first time going to a wedding as a guest (I've always been in the wedding party and the 3 weddings I've been in were for family members)

This is a coworker wedding. They come from crazy money. Her bridal set was custom made by Neil Lane (you know, the jeweler from the bachelor). Her dress is custom apparently from Kleinfeld. They have iced shoes (yes. DIAMONDS AND SWAROVSKI CRYSTALS ON THEIR SHOES)

What do you get as a gift for a young couple who is already wealthy? They're having a huge splashy event at this gorgeous venue and have booked 45 hotel rooms at a nearby hotel and are shuttling guests back and forth in limos and party buses.

I'm not fancy. I'm not rich. I bought a dress on sale for $49.99 (one that I can wear again lol)

What is a suitable gift? Money? An item? They don't have a registry. I don't want to show up empty handed. They are splashy but they have the best hearts and are genuine people. They spoiled my daughter when she was born. They had someone come in and cook for us for two weeks after we got home with her. If you passed them in the street, you'd think they're just regular Joe's. Super approachable. Very giving. Not arrogant.