As natural disasters become increasingly more common and get increasingly more hilarious names, Spare One has designed an awesome tool to up your emergency preparedness. Powered by one (included!) AA battery, this waterproof emergency mobile phone can act as both a cheap travel solution and a lifesaving tool.
You can use the SIM card from your existing phone and keep your old number, or you can buy a prepaid SIM card in your country of choice. Spare One even lets you make a SIM-free call to emergency services in your time of need. Keep this nifty device in the drawer with your hand-powered flashlight, portable stove, and "emergency" copy of The Amazing Spider-Man #121.