The only thing worse than paying $25 for a water bottle night light, is paying $5+ for a Nalgene water bottle, instead of recycling a pop/water bottle...

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(Actually, the solar-powered LED flashlight part is hard to come by - the only commercial competitor is the Freelight, which needless to say, isn't free either at around $25. Mind you, in A Future Without Oil, a guy with solar-powered flashlight technology is gonna have a head start in the blackout...)