How the Crown Cork Bottle Cap Changed Soda and Beer

William Painter's 1892 invention of the crown cork bottle cap, a simple metal disc with a crimped edge that provided an airtight, disposable seal for carbonated beverages.

What it covers

The device functions by using a metal cap with a corrugated or crimped edge that is pressed over the rim of a glass bottle. A small gasket inside the cap creates a hermetic seal against the bottle's lip. This design allows the cap to withstand the internal pressure of carbonated drinks like beer or soda without leaking or popping off prematurely. It is designed to be easily removed using a separate opener, rendering the cap single-use.

What it doesn't cover

• —Does not cover screw-top bottle closures.
• —Does not cover cork-based stoppers that rely on friction inside the bottle neck.
• —Does not cover re-sealable caps or flip-top mechanisms.
• —Does not cover the glass bottle design itself.

The clever bit

The genius lies in the crimping process; by deforming the metal edge to lock under the bottle's rim, Painter created a secure, low-cost seal that could be applied at high speed on an assembly line.

Why it matters

Before this invention, bottles were sealed with expensive, difficult-to-remove, and often leaky corks. The crown cork allowed for mass-produced, shelf-stable carbonated beverages, effectively launching the modern soft drink and beer bottling industries.

Real-world examples

• 1.Standard glass beer bottles
• 2.Traditional glass soda bottles