EM Enterprises LLC invented the collar card. This is one of these products where I am not sure if it’s a great idea the world had just been waiting for or not. At least the company already got a distribution deal with Macy's.

Mr. Eisenberg from EM Enterprises says about their product: "A friend and I got fed up with always forgetting our collar stays when on the road for business or just going out.
A handful of products exist for organizing your collar stays at home, but we came up with the solution for when you leave your house and forget them. Instead of waiting for someone else to fix the problem, we went ahead and did it ourselves.
We invented and patented the Collar Card – a credit card sized card containing four “pop out” collar stays. We know there are many guys out there who will find the Collar Card to be extremely useful and thought your readers might enjoy learning about it. Very easy to forget yet a crucial part of any man’s wardrobe, the Collar Card never leaves your wallet, so you'll always have collar stays when you need to look your best."

The Collar Card sells for $1.99 each, or $4.99 for a 3-pack. Available for purchase at Macy’s, as well as select men’s clothing retailers, elite dry cleaners, and online at the collar card site.