Ionosil's Electrocolloidal Silver is a product that is classified as a water disinfection product with a strength of 10 ppm, corresponding to 100 micrograms of silver per 10 ml of product. The fact that something is in colloidal form means that it is finely divided into microscopic, free-floating particles whose electrical charge causes the particles to constantly repel each other. The particles are so small that several billion silver particles can fit in a box with the size of one by one millimeter. Ionosil consists of about 70% silver ions and the rest silver in particulate form. Our bottles are made of PET plastic and the cans of HDPE plastic. Storage: At room temperature and in the dark