It’s Jamie Oliver’s favourite gadget, what more do you want to know? Oh, go on then, we’ll elaborate, although truth be told there’s not much to it. It’s simply an iPhone case with a bottle opener attached. An elegant solution to a common problem. It’s retractable, too, so it doesn’t permanently stick out. Price: £25 • You may also like the latest impossibly slim waterproof sony xperia z3 compact android tablet.