Many Duraglas bottles were used in pharmacies for chemicals/medicinal products. This 3 ounce square bottle is beautiful emerald green.  Original aluminum lid has holes and threads on securely. Maker's mark is embossed on the side and jar information is stamped on the bottom. Owens-Illinois Glass Co. used Diamond/Oval/I on its bottles. Measures 3.75" tall X 1.5" each side X 1.25" diam mouth.