This little redware bottle is unglazed on its exterior but glazed on its interior surface. It could have held herbal medicines or cooking spices. Found with the Unglazed Redware Pot, also in this update, it can be traced back to the Jaques-McNeil House in Charlestown, MA. The property was sold to the state of Massachusetts in 1803. 
It is 5.25" tall.
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