Member Websites. Brady and C. It was created to fill a need in the jar industry. Hazel Glass first made the glass inserts that fit inside the zinc lid closures for bottles. Their first factory was in Wheeling, WV. Hazel Glass grew quickly.
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Pictures of Antique Mason Jars: Different Types at a Glance
The base of a bottle typically only has one primary function besides helping hold the bottle together and that is to provide a flat surface for the bottle to stand upright. The following is from the British Glass website and explains it at least in part:. Bottle bottoms aren't flat because they need an arched structure to allow them to be stable on a flat surface. The bottom of a bottle is usually the thickest part, retaining more temperature throughout the production line. Because the bottom is hotter, it is also more fluid and has a tendency to sag, forming a shape like a spinning top which makes it unstable on flat surfaces.
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