The LightCap is basically a solar powered water bottle which has a built-in LED light in its lid. It features a waterproof solar panel, battery pack, and “will stay bright for hours while the rechargeable Ni-Cad batteries will last for at least 300 cycles” on a four hour charge — in sunlight. This device measures 8 ¼” tall and 3 ¾” wide with a 32 oz capacity. No word yet on pricing and availability. One more pic after the jump.

Set it in the sun or hang it from a railing during the day and you’ll have light all night long!

[via YankoDesign]