Here at Jackson's we use traditional amber glass bottles to package our lactose free cell salts. Amber glass blocks almost all UV light which can degrade the cell salt potency (ie strength), thus making it the best choice for optimum protection against damaging UV light. Amber glass is also impermeable and inert, making it ideal for sensitive homeopathic remedies like tissue cell salts. Unlike plastics, there is no potential leaching of the product material into the salts. There is a reason that amber glass bottles are the preferred storage containers of homeopaths, naturopaths, and herbalists alike! In addition, if recycled properly, glass is able to be completely recycled into more glass and it takes less energy to break down than plastic. Read more