Common Antique Bottle Myths Every Collector Should Stop Believing

Truth: Bubbles in glass can be telling (and something to look for), but they’re not definitive proof that the bottle is old. Glassblowing in the 18th and 19th centuries often resulted in trapped air bubbles, but modern reproductions can mimic this look. Some mass-produced bottles from the early 20th century also feature bubbles. Instead, focus on other details like mold seams, pontil marks, and overall wear to assess authenticity.¹

Truth: It’s a common color—and, in most cases, the bottle wasn’t always purple. Bottles with a purple tint got their color from manganese dioxide, a chemical added to decolorize glass. Prolonged sun exposure causes the glass to turn purple over time. While striking and a sign of age, these bottles are more common than you think, so don’t let the color fool you into overpaying.²

Truth: Embossed details can be helpful, but they’re not a surefire sign of age. Many collectors believe embossed text or images make a bottle inherently valuable or antique. While markings can help date a bottle—like the classic “Duraglas” stamp used after 1940—they don’t automatically mean it’s old or worth collecting. Always cross-reference markings with known manufacturer timelines.³

Truth: Any damage to antique bottles usually affects value, but the context matters. While pristine bottles typically command higher prices, rare or historically significant bottles can still hold value regardless of condition. For example, an early 19th-century bottle with a unique provenance might still attract collectors despite minor flaws or restorations.⁴

Truth: Antique bottle value depends on rarity, condition, and demand—not just age. The unfortunate truth is that most antique bottles are not worth a fortune. For example, soda bottles from the 1920s might be fun to display, but they’re often mass-produced and low in value. On the other hand, rare bottles—like 19th-century bitters bottles or apothecary jars— can fetch high prices. It’s all about knowing the market and recognizing what collectors covet.⁵

Truth: Many older bottles were mold-blown or machine-made. Hand-blown bottles are desirable for their craftsmanship, but mold-blown bottles were also popular during the 19th and early 20th centuries. (Machine production dates back to the late 1800s.) The automatic bottle-making machine revolutionized glass production in 1903, meaning bottles produced this way can still be over a century old.⁶

Truth: Some reproductions are collectible in their own right. In other words, not every reproduction is a bad investment. Bottles recreated during the 1960s and 70s, like those from Avon as part of the Midcentury nostalgia wave, are now collectible among certain buyers. Just don’t confuse them with true antiques.⁷