Spotting Quality in Vintage Glassware Collections Without Getting Ripped Off

This guide breaks down the technical markers used to distinguish high-end vintage shot glasses from modern mass-produced junk, focusing on glass composition, manufacturing techniques, and maker identification. You'll learn how to tell if that piece in the thrift store is a rare pre-prohibition find or a dollar-store reproduction that isn't worth the shelf space it's taking up. Most collectors start out buying anything with a logo on it, but if you want a collection that actually holds value, you've got to look closer at the glass itself.

What are the signs of a hand-blown shot glass?

Before machines took over the industry in the early 20th century, every small glass was made by hand. Identifying these pieces requires looking for specific imperfections that machines simply don't make. The most obvious sign is the pontil mark on the bottom of the glass. This is a rough scar or a polished-out indentation where the glass was snapped off the blowpipe. If the bottom of your shot glass is perfectly smooth and flat without any sign of a scar, it's almost certainly machine-made. Hand-blown pieces also often have small, seeds-sized air bubbles trapped in the walls of the glass. While modern collectors might see bubbles as a flaw, in the world of antique glassware, they're often proof of age and authenticity.

The weight of the glass tells a story too. Hand-blown glasses are rarely perfectly symmetrical. If you hold a glass up and notice the rim is slightly thicker on one side or the walls aren't perfectly uniform, you're likely holding something made by a human. These pieces have a soul that machine-pressed glass lacks. You can find more detailed technical descriptions of early glassmaking at the