Some of the better travel supply places have started offering RFID blocking passport holders.
Sign of the times, I suppose.
Wonder if aluminum foil works? :)
10 seconds in a microwave on low also works.
You asked — Wonder if aluminum foil works? :)
—
In Texas and Oklahoma, they have these boxes that charge the toll on the Toll Roads, automatically, as you drive at normal speeds on the highway, right through the toll “gates”.
They supply you with special cellophane-type bags (you can see through them, slightly) that will shield the signals and prevent these devices from working. This is for when people want to pay a toll manually, and not use the “Pike Pass” (in Oklahoma) and the “TollTag” (from NTTA; North Texas Tollway Authority).
So, you can use one of their bags, for that purpose, too.