Glass dropper bottle options include: amber, blue/cobalt, transparent/flint and green, and can also be customized. Among these options, if you are concerned about UV protection, amber is the best choice. Other colors have become popular because most glass bottles are stored in a dark environment-so UV protection is usually not the primary concern. Although dark bottles such as blue or purple may limit visible light, they lack the UV protection of amber glass. At Xiamen CreditPlus Imp & Exp, Inc, we provide dropper bottles in various colors, and even spray bottles.