At the 2007 Outdoor Retailer Show, Aquastar announced the mÃœV (pronounced "move") water filter.

It looks like an interesting alternative to chemical treatment.

It's a simple UV device that you submerge in water to kill bacteria. Drop it into a bottle or pan of water for a few minutes and wait while the UV ray zap all the little critters.

It can be recharged by simply attaching the leads to a battery. A single charge will treat about 15-20 litres of water, and a single Duracell D-Battery will provide enough juice to re-charge the filter 10 times.

Weighs in at a respectible 2.4 oz.

Available at Aquastars website.