Glass onions or onion bottles, were a shape of

bottle A bottle is a narrow-necked container made of an impermeable material (such as glass, plastic or aluminium) in various shapes and sizes that stores and transports liquids. Its mouth, at the bottling line, can be sealed with an internal ...

developed and used during the 17th and 18th centuries. With new techniques of glass-making, the bottles marked a move away from ceramic

pottery Pottery is the process and the products of forming vessels and other objects with clay and other raw materials, which are fired at high temperatures to give them a hard and durable form. The place where such wares are made by a ''potter'' is al ...

Background

Onion bottles most commonly were used to hold

wine Wine is an alcoholic drink made from Fermentation in winemaking, fermented fruit. Yeast in winemaking, Yeast consumes the sugar in the fruit and converts it to ethanol and carbon dioxide, releasing heat in the process. Wine is most often made f ...

, but were also used for

spirits Spirit(s) commonly refers to: * Liquor, a distilled alcoholic drink * Spirit (animating force), the non-corporeal essence of living things * Spirit (supernatural entity), an incorporeal or immaterial being Spirit(s) may also refer to: Liquids ...

. At the beginning of the 17th-century wine bottles were small and thin-walled, making them difficult to store and ship. During the 1630s,

privateer A privateer is a private person or vessel which engages in commerce raiding under a commission of war. Since robbery under arms was a common aspect of seaborne trade, until the early 19th century all merchant ships carried arms. A sovereign o ...

turned inventor

Kenelm Digby Sir Kenelm Digby (11 July 1603 – 11 June 1665) was an English courtier and diplomat. He was also a highly reputed natural philosopher, astrologer and known as a leading Roman Catholic intellectual and Thomas White (scholar), Blackloist. For ...

teamed up with James Howell, creating a method of making stronger glass with hotter furnaces. Digby owned a glassworks that made bottles which were globular in shape with a high, tapered neck, a collar, and a punt. His manufacturing technique involved a coal furnace, made hotter than usual by the inclusion of a wind tunnel, and a higher ratio of sand to

potash Potash ( ) includes various mined and manufactured salts that contain potassium in water- soluble form.

and

lime Lime most commonly refers to: * Lime (fruit), a green citrus fruit * Lime (material), inorganic materials containing calcium, usually calcium oxide or calcium hydroxide * Lime (color), a color between yellow and green Lime may also refer to: Bo ...

than was customary. Digby's technique produced wine bottles which were stronger and more stable than most of their day, and protected the contents from light due to their green or brown translucent, rather than clear transparent, color. These early bottles, usually referred to as "shaft and globe" bottles, evolved into the onion bottle shape by the 1670s. This shape gradually evolved to be stouter with a broad base and short neck by the end of the 17th century, then became elongated during the onset of the 18th century. Onion bottles were dark green or brown from

iron oxide An iron oxide is a chemical compound composed of iron and oxygen. Several iron oxides are recognized. Often they are non-stoichiometric. Ferric oxyhydroxides are a related class of compounds, perhaps the best known of which is rust. Iron ...

found within the sand used to make them. The color was further darkened by the coal used to heat the furnaces, leaving the bottles almost black. Collars were applied to the tops for corks to be tied down. When shipped, they would be laid on their sides to soak the cork and help prevent

oxidation Redox ( , , reduction–oxidation or oxidation–reduction) is a type of chemical reaction in which the oxidation states of the reactants change. Oxidation is the loss of electrons or an increase in the oxidation state, while reduction is ...

of the wine. Spirits such as

brandy Brandy is a liquor produced by distilling wine. Brandy generally contains 35–60% alcohol by volume (70–120 US proof) and is typically consumed as an after-dinner digestif. Some brandies are aged in wooden casks. Others are coloured ...

were also added to the wine to extend its life when shipping overseas.

Gallery

Berkshire, Onion bottle (FindID 257645).jpg, Onion bottle circa 1680 and 1700 A Post Medieval glass wine bottle dating from AD 1690-1700. (FindID 891131).jpg, Onion bottle circa 1690–1700 KENT-D30418 (FindID 729272).jpg, Onion bottle circa 1700 and 1750

References

Glass bottles

Onion An onion (''Allium cepa'' , from Latin ), also known as the bulb onion or common onion, is a vegetable that is the most widely cultivated species of the genus '' Allium''. The shallot is a botanical variety of the onion which was classifie ...

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