St Sixtus Abbey in Westvleteren, Flanders, is one of the world's 14 official Trappist beer producers. Buyers can purchase a crate of its Westvleteren beer for around €45 (£40), around €1.80 ...

Of the 10 Trappist monasteries that produce beer, Westvleteren produces the least: just under 4,000 barrels, or 126,000 gallons, a year. The largest, Chimay, produces about 3.2 million gallons a year.