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The AeroPress is a manual
coffeemaker A coffeemaker, coffee maker or coffee machine is a cooking appliance used to brew coffee. While there are many different types of coffeemakers, the two most common brewing principles use gravity or pressure to move hot water through coffee ...
invented by
Alan Adler Alan Adler is an American inventor. His inventions include aerodynamic toys under the Aerobie brand, such as footballs with fins, flying rings and discs, as well as a manual coffee brewing device, the AeroPress. His Aerobie Pro flying ring set ...
, 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 at the bottom of the chamber by pressing the plunger down through the chamber. It is capable of brewing highly concentrated coffee, which the manufacturer describes as "
espresso Espresso (, ) is a concentrated form of coffee produced by forcing hot water under high pressure through finely ground coffee beans. Originating in Italy, espresso has become one of the most popular coffee-brewing methods worldwide. It is cha ...
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 a type of coffee prepared by the process of steeping coffee grounds in water at cool temperatures for an extended period. Coarse-ground beans are soaked in water for 12 to 24 ...
.


History and design

The AeroPress was invented by retired
Stanford Leland Stanford Junior University, commonly referred to as Stanford University, is a private research university in Stanford, California, United States. It was founded in 1885 by railroad magnate Leland Stanford (the eighth governor of and th ...
engineering Engineering is the practice of using natural science, mathematics, and the engineering design process to Problem solving#Engineering, solve problems within technology, increase efficiency and productivity, and improve Systems engineering, s ...
lecturer
Alan Adler Alan Adler is an American inventor. His inventions include aerodynamic toys under the Aerobie brand, such as footballs with fins, flying rings and discs, as well as a manual coffee brewing device, the AeroPress. His Aerobie Pro flying ring set ...
. 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. Multiple machine designs have been created to produ ...
, pour-over brewer, and
french press A French press, also known as a cafetière, ''cafetière à piston'', ''caffettiera a stantuffo'', press pot, coffee press, or coffee plunger, is a coffee brewing device, although it can also be used for other tasks. The earliest known devi ...
, 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 of the chamber, to hold a small round paper filter in place. The AeroPress 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 the included 350 filter papers. Metal filters are available directly from AeroPress as an additional purchase. 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 ester, carbonate groups in their chemical structures. Polycarbonates used in engineering are strong, toughness, tough materials, and some grades are optically transp ...
, but in 2009 switched to BPA-free
copolyester A copolyester is a copolymer synthesized by modification of 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 (C ...
, 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 Propene, propylene. Polypropylene belongs to the group of polyolefin ...
. 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 a mug with a lid. In August 2021, Tiny Capital, a Canadian holding company, purchased a controlling interest in Aeropress. In 2023, AeroPress, Inc. released the AeroPress Clear. This is constructed of a new material called Tritan, and comes with only the measuring spoon, stir stick, and 100 paper filters.


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 Oslo ( or ; ) is the Capital city, capital and List of towns and cities in Norway, most populous city of Norway. It constitutes both a Counties of Norway, county and a Municipalities of Norway, municipality. The municipality of Oslo had a populat ...
, 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 and COVID pandemic), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), began with an disease outbreak, outbreak of COVID-19 in Wuhan, China, in December ...
. 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 The World Barista Championship (WBC) is an annual barista competition operated by World Coffee Events for the title of World Barista Champion. The competition is composed of the winners of the national barista championships, which are operated by ...
, 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 an inverted brewing technique for the Aeropress. 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

* 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 may use a finer grind than other immersion brewers and may take less time to brew coffee, sometimes around 30 seconds. Pressure is used by the AeroPress to aid in extraction, unlike the French press, the Siphon brew, or most other immersion coffee brewers. Reusable metal mesh filters are available for the AeroPress. In 2017, the manufacturer explicitly recommended against using them, claiming that coffee brewed with paper filters had tested better for taste. In contrast, some immersion brewers, such as the French press, are used almost exclusively with metal filters. As of 2024, the manufacturer's website makes no references to the previously claimed inferiority of metal filters. AeroPress, Inc. in fact now markets its own line of stainless steel mesh filters .


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 Coffee appliance vendors 2005 establishments in the United States