Well, it's not really a thing. It's a lightbulb. It's about the size of a bicycle bell and flat on the side that the light shines out and pointed on the other side. WHat can I do? I was totally thinking of a belt buckle, but if you have any other ideas I'd be glad to hear them!
I bought 34249037483294723 (approximately ) large buttons and got a pin and spent ages engraving all those different ways of saying "I Love You" on them.. then put them in a box and made a sign using a sewing-inspired font from DaFont.com saying "Just because you're cute as a button"... He laughed for about half an hour afterward, and still has all the buttons 3 months later.