1.2 LITER PLASTIC BOTTLE
3.STONEs(5mm to 15mm)size
4.STONEs(2mm to 5mm)size
Step 1: CUT THE BOTTLE
now drill a hole on the bottle cap to get filtered water out
Step 2: CLEANING
Step 3: MAKING
~first put the large stone into the bottle up to 8cm
~And put small stone above big stones of 8cm
~now add sand above the small stones of 8cm or more
~open the bottle cap and place some cotton and close the bottle with bottle cap which was drilled
Step 4: WORKING
The sand at the top layer will filters off dust's,dirt,and bacteria from the water .
Two layers of stone will filter off the sand at the top layer to the water at out.
The cotton at the bottle lid is finally to make sure of filtering sand and dust at water out.
Now we can get purified drinking water