They may seem a little flimsy but that's the idea – cardboard speakers are naturally more friendly for the environment but what really benefits the consumer is the ingenious design that enables them to fold flat when not in use.

The perfect travel accessory for the music loving environmentalist (or Christmas gift from Bob Geldof), these are very light and can easily be plugged into your portable CD player or iPod. While they may not bring down the house, they're available for less than £20 at Muji.