Protect your essential oils with Dropper Stop dropper bottles in decorative amber or cobalt blue colors. This pack of 6 amber 4oz 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.