It can store keys, cash and credit cards ??? and is also big enough to hide an iPhone, Blackberry or other mobile phone.It is also small enough to be easily portable, measuring 16.5cm by 6.7cm by 2.7cm.It works via a simple visual trick.It looks, to first, second and third glances, like the sort of mundane plastic container found in every travel bag ??? rather than a potential treasure trove for t