his is a very rare Superior Mineral Water Cobalt Blue Bottle made by Union Glass Works Philadelphia around 1840-60. It is embossed "Union Glass Works Philad." "Superior Mineral Water" and "Sydam & Dubois N.Y." Iron Pontil, Cone Top. 2 internal cracks that do not go to the surface are noted as shown in photos. Similar bottles without any internal crack have brought $1250-2500 at bottle auctions, this rare example is sold AS-IS. Bottle measures approximately 7 3/4 inches in height, 2 1/2 inches in diameter at the base.