For a few years, Kenna would occasionally misplace her square card reader. This meant a quick scramble to nearby stores to buy another reader (we ended up with quite a few and have shared them with other vendors). With loving kindness, Bryan made a holder for her key chain and we haven't had to replace a card reader again.
We hope these holders solve a problem for you and that you love them as much as we love ours! Let us know if there is a specific color you are looking for.