Nauticalia

As backed by the Dragons on BBC's Dragons' Den.

Dropping your keys in water is all too easy (besides expensive, inconvenient and embarrassing), but traditional floating key rings are bulky and will only support a couple of keys. The Waterbuoy is an amazing new version just 3" long - an easy fit-in-your-pocket - yet has the ability to bring loads of up to 2-lb (1kg) back to the surface; it could equally save your waterproof VHF, mobile phone or digital camera.

Packed inside the smooth, soft-touch Waterbuoy's casing is a tiny gas cylinder that inflates a puncture-resistant balloon after submersion (it won't go off if you splash it) and, uniquely, inside the balloon is an LED light, visible at 850ft and lasting 24hrs - the Waterbuoy is the world's first floating key ring that you can see at night.

SAVE £1.97 - buy two for £21.43 (everyone should have one!).