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The AeroPress is a manual coffeemaker invented by Alan Adler, founder of AeroPress, Inc. It consists of a cylindrical chamber, and a plunger with an airtight silicone seal, similar to a
syringe A syringe is a simple reciprocating pump consisting of a plunger (though in modern syringes, it is actually a piston) that fits tightly within a cylindrical tube called a barrel. The plunger can be linearly pulled and pushed along the inside ...
. Ground coffee beans and water are steeped inside, then forced through a filter by pressing the plunger through the chamber. It is capable of brewing highly concentrated coffee, which the manufacturer describes as "
espresso Espresso (, ) is a coffee-brewing method of Italian origin, in which a small amount of nearly boiling water (about ) is forced under of pressure through finely-ground coffee beans. Espresso can be made with a wide variety of coffee beans and ...
style", but can also be used to brew filter strength coffee, or
cold brew coffee Cold brew coffee, also called cold water extraction or cold pressing, is the process of steeping coffee grounds in water at cool temperatures for an extended period. Coarse-ground beans are soaked in water for about 12 to 24 hours. The water is n ...
.


History and design

The AeroPress was invented by retired
Stanford Stanford University, officially Leland Stanford Junior University, is a private research university in Stanford, California. The campus occupies , among the largest in the United States, and enrolls over 17,000 students. Stanford is considere ...
engineering Engineering is the use of scientific method, scientific principles to design and build machines, structures, and other items, including bridges, tunnels, roads, vehicles, and buildings. The discipline of engineering encompasses a broad rang ...
lecturer Alan Adler. Adler began developing the brewer in 2004, with the intention of reducing acidity and bitterness in his daily cup of coffee. Adler had tried brewing with an
espresso machine An espresso machine brews coffee by forcing pressurized water near boiling point through a "puck" of ground coffee and a filter in order to produce a thick, concentrated coffee called espresso. The first machine for making espresso was built in ...
, pour-over brewer, and french press, but expressed dissatisfaction with each brewer's limited control over parameters such as brew time, water temperature, and grind size. He first began prototyping the AeroPress in his garage. The brewer consists of a translucent cylindrical chamber, and a plunger with an airtight silicone seal, similar to a
syringe A syringe is a simple reciprocating pump consisting of a plunger (though in modern syringes, it is actually a piston) that fits tightly within a cylindrical tube called a barrel. The plunger can be linearly pulled and pushed along the inside ...
. A filter cap is screwed onto the end, to hold a small round paper filter in place. It comes bundled with several accessories, including a scoop and funnel for loading ground coffee, a stirring paddle, a tote bag, and a plastic holder for storing filter papers. Metal filters are available, but Aeropress do not supply them, finding that coffee made with paper filters is better. The chamber and plunger are moulded out of translucent plastic, tinted a grey colour. Early AeroPress models used
polycarbonate Polycarbonates (PC) are a group of thermoplastic polymers containing carbonate groups in their chemical structures. Polycarbonates used in engineering are strong, tough materials, and some grades are optically transparent. They are easily work ...
, but in 2009 switched to
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-free
copolyester Copolyester forms when modifications are made to polyesters, which are combinations of diacids and diols. For example, by introducing other diacids, such as isophthalic acid (IPA), or other diols, such as cyclohexane dimethanol (CHDM) to the polyes ...
, then in 2014 to
polypropylene Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications. It is produced via chain-growth polymerization from the monomer propylene. Polypropylene belongs to the group of polyolefins and ...
. Official AeroPress Announcement The company claims that in lab testing, no BPA leached from these early models into brewed coffee. The lettering changed color several times, but the brewer's design was otherwise unchanged between these versions. In 2019, AeroPress, Inc. released the AeroPress Go, a travel-sized model with a reduced chamber capacity, smaller accessories, and an included travel cup.


Reception


Release

The device was officially unveiled in November 2005, at the CoffeeFest trade show in Seattle. In the years after its release, it gained a cult following among coffee enthusiasts, who praised it for its flexibility and consistency in brewing.


World AeroPress Championship

The World AeroPress Championship is an international fan-led AeroPress brewing competition. The event is a multi-round, elimination tournament, in which competitors have five minutes to brew coffee. It was first held in Oslo, Norway, in 2008, with only three competitors, but grew in popularity each year after. The 2018 competition attracted 3,157 competitors from 61 countries. The 2020 championship was cancelled due to the
COVID-19 pandemic The COVID-19 pandemic, also known as the coronavirus pandemic, is an ongoing global pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The novel virus was first identif ...
. The championship resumed in 2021, with both in-person events and a new online format, in which competitors create and submit their recipe remotely.


Operation


Traditional

According to the instructions, fine-ground coffee is placed in the bottom of the larger cylinder on top of a paper microfilter. Hot water at approximately for dark roast coffee or for lighter roast is then poured over the coffee; this mixture is stirred for approximately 10 seconds before being forced through the microfilter by pushing the plunger downwards. In the different coffee competitions worldwide ( World Barista Championship, Brewers Cup), the coffee is more often ground slightly finer than 'filter grind', and the dose is between , with about of water at and a steeping time of 30 to 60 seconds.


Inverted

Baristas and coffee drinkers have also developed methods of brewing using the AeroPress with an inverted brewing technique. In inverted brewing, the plunger is placed into the column from the beginning, close to the "top" of the column, and the entire AeroPress stands upside-down, resting on the top of the plunger. One or two scoops of ground coffee are added, followed by water, and the entire mixture then stirred. While that brews, a filter is placed into the filter cap and moistened to help it stick in place then the AeroPress cap is placed on top of the column and screwed into place. Lastly, once the desired brewing time is complete the AeroPress is either turned right-side-up and plunged normally or held at an angle and plunged horizontally. This method is more similar to the French press, particularly the extended brewing time in which the grounds and water sit together. This makes it useful for using grinds that wouldn't be optimal in the official method such as coarse grinds that might be used in a French press.


Traditional method coffee properties

* Claimed to have roughly the same concentration as
espresso Espresso (, ) is a coffee-brewing method of Italian origin, in which a small amount of nearly boiling water (about ) is forced under of pressure through finely-ground coffee beans. Espresso can be made with a wide variety of coffee beans and ...
* Higher pH (thus lower acidity) than drip coffeeInventor brews a faster cup of good coffee
Knight Ridder Newspapers
* 30-second total brewing time


Contrasts with other immersion brewing methods

The AeroPress uses finely ground bean, has a short brewing time of 30 seconds and, similar to espresso, uses pressure to extract flavor. French press (cafetière) uses a much coarser grind and has a much longer brewing time of 4–5 minutes; it uses a metal filter and the coffee is brewed without pressure. Siphon brew uses intermediate fine grinds and has a 90-second brewing time, using a cloth filter without pressure.
Espresso Espresso (, ) is a coffee-brewing method of Italian origin, in which a small amount of nearly boiling water (about ) is forced under of pressure through finely-ground coffee beans. Espresso can be made with a wide variety of coffee beans and ...
runs high temperature water at very high pressure through very finely ground coffee. Unlike the AeroPress the water is forced through mechanically, rather than by the user pressing a plunger. Third-party reusable metal mesh filters are available for the AeroPress, but AeroPress does not recommend them, saying that coffee made with paper filters has tested better for taste.


Notes


References


External links

*
World Aeropress Championship
website
AeroPrecipe
– Database of AeroPress recipes {{DEFAULTSORT:Aeropress Coffee preparation American brands American inventions Products introduced in 2005