I use silent pocket for mine works great. And for my FOB that is a spare I wrap it with foil.The Thread Title says it all... Finding a faraday bag and/or box to keep my keyfobs for security and a piece of mind....
Not much luck searching here and looking at what's on Amazon, I was very skeptical on the reviews. I guess I may have to use my engineering ingenuity to design an aluminum box and lid with some EMI shielding to seal and protect them.