Description

Clear glass straight-sided bottle with a ground-glass opening and stopper at the top. The front of the bottle is labeled "Dil. acid nitric HNO3" in raised letters.

This bottle is made of Pyrex, the Corning trade name for borosilicate glass. The Corning Glass Works developed a lead-free borosilicate glass as a consumer product in 1915. Though it was first used in consumer products like pie plates and casserole dishes, WWI-era shortages in laboratory equipment (which were mainly manufactured in Germany) led the company to expand into making laboratory glassware.