Protect your essential oils with Dropper Stop dropper bottles in decorative amber or cobalt blue colors. These 1oz cobalt blue bottles are made from glass and each comes with a high quality tapered glass dropper. Cobalt blue glass dropper bottles help to protect essential oils or other contents from UV rays, prolonging their useful life. Dropper Stop specializes in dropper bottles and brings high quality dropper bottles to you at an affordable price with a brand you can trust.