Fabric Depot has RFID fabric sheets. I wish I'd have known about that fabric about a month ago. I made myself a new little case for my cards/driver's license, etc. I do have sleeves that I put my credit cards in (coated with the RFID) but it would have been nicer to line my case instead of having to slip each card into a sleeve.
https://www.fabricdepot.com/new-arri...locking-fabric
I like your little pug case. It probably makes you smile every time you pull it out.