This authentic antique cobalt blue Milk of Magnesia bottle was produced by The Chas. H. Phillips Chemical Company in Glenbrook, Connecticut during the late 1800s to early 1900s. Featuring strong embossed lettering and the original pharmaceutical branding, this bottle is a classic example of early American apothecary glass. Deep cobalt coloration makes it highly desirable for collectors, shelf displays, and vintage medical decor. A genuine antique with honest wear from age.