Jeff I could not make your link work but ( I Think ) maybe this was what you were looking for ? ///// Link Below :
http://fansofnature.blogspot.com/2013/04/drip-bottle-irrigation.html
Because this system depends on evaporation out of the small container and eventual condensation inside the later container with a little care
water that is polluted, full of excess salts/minerals/and heavy metals could be tusked as a primary water source allowing the Evaporation /
Condensation cycle to provide all of the plants hydration with very little clean water lost to Evaporation !
For the Good of the Crafts Big AL
Late note: Dale beat me to the post, The picture with my article allows a slightly clearer look, my description above is my best guess as to
whats happening !