A portable hand washing sink provides a convenient and effective solution for ensuring hand hygiene in a variety of settings, from construction sites and outdoor events to schools and remote locations.

As the epidemic situation is serious around the world. Many countries called on people to wash hands frequently. And the school season has came, students were back to school, they need more hand wash stations.

Silver ion is a cation with positive charge, which is formed by electron transfer through chemical reaction, usually in the form of aqueous solution. The solution is colorless and transparent without any solid particles.