Taking a cue from nature, dasani water coolers and Solis America, likeTeledyne, are marketing products positioned as friendly to the Earth.Dasani, took a similar ecologically friendly tack with its La Natural terra cotta water cooling unit. Water is filtered through a porous ceramic filter containing activated carbon. According to the company, the cooler removes 99 percent of cryptosporidium, bacteria, chlorine, lead and copper. As a perk, terra cotta naturally keeps water cool.