I JUST learned that this even existed!  I was always losing or ruining my husband's stays, or washing them in the washing machine and dryer, or ironing them.  This handy little box of extras is worth every penny and I keep a box in the laundry room as well as my husbands closet.  Someone initially recommended the metal ones, but I hesitated, wondering if it would set off security screening alarms.  These are just as good and so affordable you can buy more than one box to keep where most likely to be needed. Even at work!