[dbloom]

For those of you not in the loop, these "keyless" systems let you walk up to your car and open your door without getting your key out of your pocket. There is a proximity sensor under the door handle (similar to proximity sensor on your smartphone). When the proximity sensor is triggered, it searches for a nearby key fob and then instantly unlocks. You can also usually start the car (with a push-button start) without getting out the key. And you can lock the doors (from outside the car) by pressing a button on or near the door handle with the fob in proximity. Basically, you never have to get your keys out for any reason.

Anyway, fortunately, I can never find street parking near my apartment for my Prius anyway. But I'm still going to find a small faraday cage I can leave by my bed to put my keys in before I go to sleep...

[ansible]

But I'm still going to find a small faraday cage I can leave by my bed to put my keys in before I go to sleep...

A small, all-metal box will probably do just as well. For bonus points, connect it to earth ground.

[malbs]

Yeah I was thinking keeping electronics in the freezer probably isn't great, there would eventually be build up of moisture inside the key housing itself right?

some aluminium foil would do just as nicely!

[dredmorbius]

How well would an anti-static or foil-lined bag work?

[mey]

How does this work if you are around town, lets say eating lunch?

[blueskin_]

You could get an RFID-blocking wallet (should anyway, really) and put the key in that.

I have one from http://difrwear.com/; I've tested it and it's never leaked any signal from cards inside; should work fine with keys too.

[na85]

OffPocket, perhaps.