Saving water resource & saving money & protecting children from cross-infection or contagion via the viruses, such as H1N1, SARS, Avian influenza Virus/Bird flu, Enterovirus etc. when washing their hands at the public places. *Patented in USA, China , Taiwan, Japan and Europe. *Approved by EMS, CE, RoHS, ISO, FDA, ACS, & Japan Non-toxic. 30 pcs/1 carton.