I forgot about the RADsticker. I have several in my freezer. I gave my brother a couple when he traveled to Taiwan shortly after the Fukushima accident. Yes, they're good for serious levels of radiation. They won't pick up a lantern mantle or pottery with uranium in the glaze.
That sounds like a valuable piece of info right there..
I assume from your comment that storage in the freezer lengthens the life of the device.
Is that a correct assumption?