A textured pattern on the bottle base is a common characteristic of machine-made bottles.
Collectors can often find brand names or markings on the side or bottom.
Many glass companies discreetly placed their logos on the bottom of the bottle, because a label on the side took up much of the room.
The two basic types of antique bottles include mouth-blown and machine-made.
Skilled craftsmen produced mouth-blown bottles by forming hot glass with a blow pipe to create a specific shape.
The patterns reduced base surface contact and gave smoother movement on conveyor belts during production.
During the 1940s, glass manufacturers began branding their company name or logo on the bottom of the bottle.They come in a variety of colors, shapes, and sizes.Some people collect a certain type and others collect various types that they find interesting.A pointil scar or mark is a prominent feature of the bottles.Manufacturers attached an iron pointil rod to the base of the bottle to handle it while it was still hot.Certain techniques help people identify the date in which an antique bottle is from.