A History of Vintage Keystone Cups and Their Collectibility

An Introduction to Keystone Cups

Keystone cups have become a popular collectible item, especially among fans of vintage Americana. These cups were produced by the Keystone Manufacturing Company in the early 20th century and were a common sight in diners and soda fountains across the United States.

The story of keystone cups begins in 1892, when the Keystone Manufacturing Company was founded in Brooklyn, New York. Keystone specialized in enameled sheet metal products, including cups, mugs, and plates. Their products were durable and affordable, making them a popular choice for commercial use.

Keystone cups came in a wide range of colors and patterns. Some featured simple banding while others had more elaborate Art Deco inspired designs. The cups were usually branded with the Keystone name and logo. This logo, a blue keystone shape with the words "Keystone Reg. U.S. Pat. Off." was applied using a decal process.

The Heyday of Keystone Cups

Keystone cups were most popular during the 1920s through the 1950s. During this era, diners and soda fountains were a mainstay of American life. Going out for a soda was a favorite teenage pastime. Milkshakes, ice cream floats, and sodas were all served in classic Keystone cups.

The cups were disposable, which made them convenient for soda fountains. Servers could simply toss the cups after customers finished their drinks. The branded cups also provided good advertising for the Keystone company. Having the Keystone name on display in diners across the country increased brand awareness.

In the 1950s, Keystone estimated that their cups were used to serve over 300 million drinks annually. They provided cups to restaurants, hospitals, schools, and government facilities. Their products were durable enough for repeated commercial washings.

Decline and Collectibility

The popularity of Keystone cups began to decline in the 1960s. This was due to competition from paper and plastic cups. The rise of fast food chains also cut down on business from traditional diners and soda fountains.

Keystone went out of business in the 1970s. While no longer in production, Keystone cups remain popular among collectors. Their nostalgic appeal and retro styling makes them sought after antiques.

There is a lively collector's market for keystone cups today. Rare styles or colors can sell for upwards of $50 per cup. More common cups in average condition usually sell for $5-10. Full sets of cups command an even higher price.

Tips for Collecting Keystone Cups

Here are some tips for keystone cup collectors:

• Search antique stores, flea markets, estate sales, and online auctions to find cups.
• Look for cups in good condition without chips, cracks, or fading.
• Enamel should be shiny and logos should be legible.
• Stacking cups can bring a higher price than single cups.
• Rarer colors like pink, yellow, or turquoise are more valuable.
• Buy from reputable sellers with good descriptions and photos.

Cleaning and Care

Keystone cups should be washed by hand with warm water and mild detergent. Avoid harsh scrubbing as this can damage the enamel. Antique cups should not be placed in the dishwasher.

Acids like lemon juice or soda should be washed off promptly. Prolonged contact can etch the enamel. Cups should be dried thoroughly after washing. Store cups stacked inside each other or wrapped in tissue paper.

The Enduring Legacy of Keystone Cups

Though no longer made today, keystone cups remain an iconic symbol of vintage American diner culture. They represent a simpler time when going out for a soda was a special treat. The retro styling and colorful designs of keystone cups have also made them popular collectibles.

Keystone cups have become a way for people to own a tangible piece of 20th century history. Their stylish designs also work well for displaying in retro-themed kitchens or restaurants. Vintage keystone cups add a fun accent to any collection of antiques or Americana.

FAQs

When were keystone cups manufactured?

Keystone cups were produced from the early 1900s to the 1970s. They were most popular during the 1920s through the 1950s.

Where were keystone cups used?

Keystone cups were used in diners, soda fountains, restaurants, bars, hospitals, schools, and many commercial establishments across the United States.

What materials were keystone cups made from?

Keystone cups were made from enameled sheet metal. This gave them a shiny, durable finish that could withstand repeated washings.

Why did keystone cups decline in popularity?

The popularity of keystone cups began fading in the 1960s due to competition from paper and plastic cups. The decline of diners also decreased demand for the cups.

How much do vintage keystone cups sell for?

Prices vary based on rarity, condition, color, and design. Common cups in average condition sell for $5-10. Rarer cups can sell for $50 or more.