free samples

india is probably going international.
p&g offers free samples in india.
use and recommend.
register here.

http://www.rewardme.in/

solar water purifier

the website below says this solar water disinfection device
which can be attached to a pet bottle will make the water
in the bottle  potable with a few hours of exposure
using just the uv rays of the sunshine; no chemicals or electricity.
the site says it is going to test the device in odisha in a big way.
u can get the device called WADI for about 50 pounds now.
the ultimate price when distributed on a large scale will be
much less.

http://www.indiegogo.com/projects/helioz-wadi-a-new-inexpensive-and-sustainable-solar-water-disinfection-tool

3D printers

3D printing is not printing but manufacturing things
using a computer design automatically. well almost.
the site below gives details of a 3D printer which
can make things almost 6 inch in dimension.
the printer costs  about 1000 usd . if any one has
first hand experience of using 3D printer please post
 it here as guidance for intending users. i have no
personal experience.

http://www.indiegogo.com/projects/fabtotum-personal-fabricator