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Soda siphon The soda siphon (sometimes spelled syphon), also known as the seltzer bottle, siphon seltzer bottle, or just siphon) is a device for storing and dispensing carbonated beverages (typically carbonated water) while maintaining the internal pressure, thereby preventing it from going flat. The carbonated beverage is dispensed using the internal pressure of the bottle, so the setup is not a true siphon in its operation. History As early as 1790, the concept of an "aerosol" was introduced in France, with self-pressurized carbonated beverages.[1] The modern siphon was created in 1829, when two Frenchmen patented a hollow corkscrew which could be inserted into a soda bottle and, by use of a valve, allowed a portion of the contents to be dispensed while maintaining the pressure on the inside of the bottle and preventing the remaining soda from going flat.[2] Soda siphons were popular in the 1920s and 1930s. The rise of bottled carbonated beverages and the destruction of many of the siphon manufacturers' plants in Eastern Europe during World War II led to a decline in their popularity in the years after the war.[2] Classic bottles wrapped in metal mesh are still commonly used in some bars to make drinks, and are used to enhance a period ambiance in traditionally themed dining venues. Modern-day production Commercial production and delivery of pre-filled bottles of seltzer continued in the Southern California and Eastern Seaboard regions of the US into 2009.[3] As of 2009[update], such delivery service continues in Argentina (nationwide), Vienna, Austria by Brauerei Ottakringer and in Toronto, Ontario, Canada.[4] As of 2015[update], Coca-Cola Mexico began distributing its Ciel-branded mineral water in 1.75 litre plastic siphon bottles with a reusable plastic head assembly.[5] In the UK, Adcocks Syphons remains the sole producer and bottler of siphons operating in the country, with several stockists selling their product throughout the country.[6] Although Acqua Spumante reconditions and restores vintage siphons for the modern market, operating via an eBay store and own website.[7] FillingFor making single-use sealed bottles, or commercially refillable bottles in a seltzer plant, the bottles are first washed and then evacuated using a vacuum pump, and a rubber hose is slipped over the nozzle. The bottle with most of the air removed is then held upside-down under the surface of a tub of carbonated water, which is drawn into the bottle by the vacuum inside when the valve is opened. Sometimes a pump is used to force higher pressure into the bottle. For portable 1 litre bottles, the head of the siphon bottle is removed for filling. A rubber seal and tube are also removed. Then about 1 litre of very cold water (which can absorb more carbon dioxide) is added to the bottle; the bottle is not completely filled. The rubber seal, tube, and head are then reassembled. An 8-gram CO2 charger is inserted and securely screwed into a port in the head; the port has a conical seal and a hollow pin that pierces the charger and lets the gas into the bottle. When the sound of the gas bubbling into the water is heard, the bottle is shaken, then left to rest. Within seconds, the trigger pull will release seltzer water. Modern manufacturers such as SodaStream and Aqvia market soda machine systems which can carbonate beverages using larger carbon dioxide canisters, which may be more economical than the traditional small gas cartridges. See also
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