The modern history of Guinness is a story of engineers more than marketers — even though the marketing has been spectacular. Three innovations in particular separate the contemporary stout from its 19th-century ancestor: nitrogen dispense, the in-can widget, and Guinness 0.0. Each was the product of long, patient laboratory work, not a slogan.
1959 — Michael Ash and the Velvet Head
For a century and a half, draught Guinness was served from wooden casks pressurised with nothing but their own slow secondary fermentation. The pour was unpredictable. Some pints were superb. Many were flat.
In the 1950s, the brewery hired a young mathematician-turned-brewer named Michael Edward Ash and gave him an open brief: solve the pour. After several years of experimentation, Ash arrived at the answer that now defines the brand — nitrogen.
Carbon dioxide, the gas used in nearly every other beer, produces large fast-rising bubbles that dissipate quickly. Nitrogen, dissolved under pressure and forced through a fine restrictor plate at the tap, produces something else entirely: tiny, slow, almost-creamy bubbles that descend visually before settling into a stable head.
The first nitrogen-dispensed Guinness, called “Easy Serve”, was rolled out in Dublin pubs in 1959 to mark the brewery's bicentenary. Within a decade it was the standard. The famous two-part pour — pour, wait, top up — is a direct consequence of Ash's nitrogen physics.
What the wait actually does
The nitrogen-saturated beer enters the glass under pressure, then begins to release. The dense bubbles need roughly 119 seconds to settle into the characteristic creamy band at the top of the pint. The bartender pauses; the customer pauses; the room pauses. The wait is not theatre — it is fluid dynamics.
1989 — The Widget
By the 1980s, Guinness was selling in supermarkets, but the canned version was a pale imitation of the draught. The nitrogen physics that worked at the tap did not work inside an aluminium can.
The brewery's engineering team, led by Alan Forage, developed something now considered a small marvel of beverage engineering: a hollow plastic sphere about the size of a large marble, charged with nitrogen, sealed inside the can. When the can is opened, the pressure drop forces the nitrogen out through a tiny hole; the gas is whipped through the beer; and the draught experience is recreated, almost faithfully, in your kitchen.
The widget was patented in 1989. In 1991, it won the Queen's Award for Technological Achievement, beating out the internet for the prize that year. The judges were not wrong.
2000 — The Storehouse
An old fermentation plant at St. James's Gate, no longer needed for production, was converted into a seven-floor visitor experience shaped like a colossal pint glass. The Guinness Storehouse opened in November 2000 and within a decade became the most-visited paid tourist attraction in Ireland.
It is, in essence, a museum of the brewery's own self-mythology — the posters, the harp, the cooperage, the pour. It also, importantly, includes the Gravity Bar at the top, which gives a 360° view over Dublin while you drink your pint. The pour is excellent. The view is the bonus.
2020 — Guinness 0.0
For the four years preceding 2020, a small team at St. James's Gate worked on a problem that, on paper, sounded sacrilegious: how to remove the alcohol from a stout while preserving its body, its bitterness, and the cascade of its head.
The answer was cold filtration. The beer is brewed conventionally and then the alcohol is gently removed at low temperature using a membrane process — preserving more flavour compounds than thermal distillation. The result is Guinness 0.0: a beer that drinks like Guinness, looks like Guinness, pours like Guinness, and has no alcohol.
It launched in October 2020, was briefly recalled for a microbiology issue, then relaunched in 2021 to broad acclaim. Read more about Guinness 0.0 →
What the next 8,733 Years Look Like
The brewery's lease still has a comfortable runway. As of 2026, sustainability targets sit at the centre of every long-range plan: water reduction, regenerative barley sourcing, scope-3 emissions across the supply chain. The recipe is unchanged. The barley is more thoughtful. The beer is the same colour it has been since 1799.
Read also: Part I — Arthur Guinness and the Nine Thousand Years ←