Protect your essential oils with DropperStop dropper bottles in decorative amber or cobalt blue colors. This 12-pack of 1oz cobalt blue glass bottles each come with a high quality tapered glass dropper. Colored glass dropper bottles help to protect essential oils or other contents from UV rays, prolonging their useful life. DropperStop specializes in dropper bottles and brings high quality dropper bottles to you at an affordable price with a brand you can trust.