Solar Bottle Cap Lantern

Solar lantern cap for wide mouth water bottles (Nalgene, Camelbak, MSR, etc). It uses four 10mm socket cap M3 screws and the electronics from a [3 LED solar flashlight](http://www.dx.com/p/3-led-solar-power-self-recharge-flashlight-keychain-white-19827#.VDJUaEtDRFw).