Jameson's Caskmates Stout Edition Irish Whiskey is that very beverage, with the 70cl bottle currently just £19.99 at Amazon, reduced from £29. That’s £9.51 cheaper than its Tesco price.

Amazon is serving up a humongous 1.5L bottle of Jameson's Original Triple Distilled Blended Irish Whisky for just ... on Sainsbury's site, where a 70cl whisky bottle retails for £25.