Although UK cities are hardly as crime-stricken as the streets of Gotham, some of our more safety-conscious readers may be interested in this phone case from Spraytect. The pepper spray case offers an altogether different form of protection, allowing users to easily ward off attackers with its detachable pepper spray cartridge. Or you can choose to leave it on the back and use it while attached to your smartphone. The case comes in both pink and blue but is currently only available for the iPhone 4 and 4s. Price: £30 • You may also like the latest impossibly slim waterproof sony xperia z3 compact android tablet.