A late 18th or early 19th c. redware bottle with a modest green glazed exterior.
Potted of a lighter colored glaze in fine refinement with a light and clean profile. A simple incised line just above the shoulder decorates its neck. The base is flat footed on the underside with remnants of the overspill of clear glaze. 
The bulbous body conforms somewhat closely to olive colored glass and dark amber colored glass bottle designs of the 18th c. Rural manufacture rather than inner city work arises as the most likely place of origin. Rural potteries in both New England and New York have a known history of producing redware bottles with examples seen in "America's Great Awakening and Migration: The Red Earthenware of Western New York". 
Redware bottles of the northeast are somewhat of a scarcity and were not a commonly produced product as a result of imported English glass.
Survives an overall excellent state of condition with a few small flea bites to the top of its rim and a small old glaze chip to the inside of the lip. 
Northeast, New York or New England in origin. Ca. 1790-1840. 8 1/2"T.