How are old wine bottles dated?

Dating relies upon evaluating the depth of the base indentation, the shape of the lip, and the colour saturation of the material. Changes in manufacturing techniques from Georgian free-blown methods to later Victorian styles also provide clear chronological markers.

What is an onion bottle?

An onion bottle is an early compact, bulbous glass container designed with a short neck to sit steadily on tavern tables. These heavy vessels date predominantly to the eighteenth century and served practical wine storage functions.

Can these bottles hold liquid today?

Many examples remain structurally sound enough to hold liquids safely, provided they are washed gently by hand. Collectors generally use them for display or serving aged wines rather than daily kitchen storage.

Why do some bottles have rough bases?

Rough bases indicate the vessel was detached manually from a pontil rod during the traditional glassblowing process. This physical evidence confirms the piece was shaped by hand rather than moulded mechanically in a factory.