E. R. Durkee & Co. New York old med bottle purple tinted

The glass used for this bottle contains mangenese, which when exposed to the sun's UV rays, will very slowly start to change the color of the glass to a beautiful purple. I have been a collector of 'purple' sun glass for years. Word of warning if you too decide to collect, there are some that will 'speed up' the process of changing the color of the glass by using a medical sterilization machine. This will then change the color to a very deep purple, may be what you are interested in, however; I enjoy the naturally colored glass. Research it, the story behind the glass, and where it came from, in your case Durkee, are always interesting since they typically were made late 1800's early 1900's. KK