SolLight Solar-Powered LightCap Water Bottle

With just a four-hour charge of sunshine the LightCap will stay bright for up to 12 hours while the rechargeable Ni-Cad batteries will last for at least 300 cycles. Set it in the sun or hang it from a railing during the day and you'll have light all night long. The LightCap comes with a white LED for reading and a red LED for ambient lighting, and it has a handy waterproof switch on the cap that lets you change from the white LED to red, or turn it off completely. It's backed by a one-year warranty for manufacturer defects.

Frequently Asked Questions:
Q. Does the light heat up the water?
A. No, LEDs put out virtually no heat.

Q. How long will the light last?
A. On a full charge (12 hours in direct sun) the white LED will last 8-10 hours while the red LED will last 16-18 hours. You may get more or less time depending on the temperature since battery performance goes down in cold temperatures.

Q. Does the LightCap need bright sun to charge?
A. No. In fact, it will continue to charge in ANY light. It will charge the fastest in bright, direct sunshine; less so in overcast or shady conditions (50 to 80 percent slower). But it will even charge inside a room with the lights on. Whenever the solar panel is exposed to light, it's charging.

Q. Why have a red LED?
A. Several reasons. First of all, a red LED draws less power than white, so the light from it will last almost twice as long (up to 20 hours on a charge). If you just want a nightlight, need a red safety light, want to keep track of your water bottle at night, or live in Antarctica, use the red LED. Finally, red light 'protects' your night vision. White light dilates the pupils in your eyes (you know how long it takes to see again at night after you turn on a bright light). Red light doesn't dilate your pupil nearly as much, so your night vision is 'protected'.