In light of recent mobile privacy revelations, your most paranoid neurons might be firing hard. You can put a tinfoil hat on your head, but what about your gadgets? These Faraday Bags put your device in a radio-proof vault.
The cases, like a standard (room-sized) Faraday cage, block out electrical charges and electromagnetic radiation - so zero signal bars for you, sir. The bags come in a variety of sizes, priced from $US80 to $US275.
They're also handy on dates. [Faraday Bags]