Collar stays from Stayclip store the collar stays in a neat way in your closet next to your dress shirts. They are available in steel, titanium or gold plated brass. The button can be mounted on the wall, so you will be reminded to remove the collar stays before you send shirts off to be cleaned. They can be engraved with a custom message for the occasion. Perhaps a simple message like "thank you". Or maybe "thank you for standing up for me" (get it?)
I think this makes a personal and useful gift for your Groomsmen.
Image via Stayclip