LIZ SHEARER: On the down side,it really works out to be quite expensive and,much more surprisingly,it unfortunately leaves a strange taste...you know when you've drunk from it...so all in all,my recommendation would be it's got plenty of advantages,but it is rather expensive so I'd say you should maybe buy it.

Moving on to a natty little device...the Whistle Key Holder.Basically this is where you whistle and the key holder gives off a high pitched noise and flashes light so you can find it.One advantage of this model is that it also has a small light.You press the button and this means you can find keyholes easily.I also felt the small size was a real advantage.On the weaker side,I did find the noise unpleasant.Which I'm sure the designers could have done something about.And I found that it didn't work through metal,so it's mainly useful for finding in coat pockets,cushions,etc.But taken as a whole I thought it was a masterpiece of design and would highly recommend it.