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. Giving a bottle an arched shape at the bottom means that if it does sag, it can do so without touching the bottom.
Vintage Bottle Guide
How to Date Antique Glass Bottles | Our Pastimes
The merger took place in June of that year. Much of their depression glass was not marked. Another very popular and much-loved pattern made by Federal is their Cabbage Rose or Sharon pattern. Sharon was the original factory name for the pattern. In modern times they are often described or listed as shot glasses or toothpick holders, and are collected by those searching for both types of glass items.
How to Date Owens-Illinois Glass
Photo courtesy of Tom K. S in a diamond horizontally oriented ………….. Yockel and his glass mold manufacturing firm, there is a letter proving that the Chicago Glass Manufacturing Co. Thus, perhaps all, if not most, hand-blown bottles with this mark were products of that company?? Perhaps time will tell.
As with wine and champagne bottles, beer and ale were bottled in a relatively limited array of bottle shapes. Beer and ale, being carbonated known as "pressure ware" in the bottle making industry , pretty much had to be contained in cylindrical heavy glass bottles since such a shape is inherently stronger than other shapes - all other things being equal, e. Beer bottles were of thick glass also since they had to be able to survive extensive post-bottling handling and use since these bottles were typically re-used many times, as evidenced by extensive base and side wear to many examples. Louis, MO. Other colors - including cobalt blue - are unusual but occasionally seen.