15 May 2008 14:25 GMT / By Amy-Mae Elliott
The LightCap 200 is a clever, weatherproof light that turns your water bottle into a solar powered lantern.
The cap fits on any standard water bottle with a 2-inch wide mouth, including those from Nalgene, Camelbak and GSI and claims to be the lightest, brightest LED cap available.
On sale now in the US, it's available in a coupla colours for $20.
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