The water barrel and sprout barrel are made out of Styrene Acetylonitrile Resin (SAN), and the water tubes and trays are made out of Acrylonitrile Butadiene Styrene (ABS). Both of these materials are US Food and Drug Administration (FDA) approved for food contact. I don’t trust that government agency for much, but I think this plastic is as good as it gets. However, if you search the internet, you can find some negative information on these materials, and also on Polycarbonate which is considered the best of the best (it is the bluish heavy grade plastic water tank you see in office water coolers.)
I have also read that whatever material is used as a container, plastics, paper, fibers, etc &, that they all leach chemicals into the water at some point in time. Is that years? or months? Of course, that does not apply to the Freshlife where the water is changed daily. But I remember reading that SAN leaches 5 – 15 ppb (part per billion) of Styrene. I am told FDA approves materials with a maximum of 30 ppm (parts per million). By that yardstick, we are at a very safe level. When you get into talking at these parts per billion levels, there are so many things in our environment that affect us at that level. Even certified organic food has been found to contain traces of pesticides in parts per billion from ambient air and water pollution. In my opinion, at this level, it is the equivalent to our daily dose of air and water pollution, or the ambient radiation from overhead electrical wires, televisions, x-rays when flying on airliners and ultraviolet radiation from the sun.