Slick tarp that collects rainwater

I love it when someone comes up with something that makes you snap your finger and say "why didn’t I think of that?" This is a slick tarp setup that collects rainwater into water bottles at the corners. You could also adapt this to collect, and filter, rainwater so as you slept in your hammock overnight it was filling your water bottles with clean water for the next day’s trip. Just a neat idea…

http://gearjunkie.com/kammok-rain-shelter