Wikipedia
Stayclip
Stayclip is a form of shirt collar stiffener (also known as collar stays).
Stayclip is a patented design that stores a set of collar stiffeners which have specially designed holes in their ends. The Stayclip system uses a unique holder with a clip, to keep the set of collar stiffeners together. By pressing a button on the holder, the arms of the Stayclip open and close to provide easy access to the stiffeners.
The collar stiffeners are available in a myriad of materials including platinum (with diamonds), gold plated brass, sterling silver, stainless steel and vinyl.