Strictly speaking, all mayonnaise is drinkable if you can reduce its viscosity sufficiently by mixing it with whiskey. But the difference here is that this mayonnaise is intended to be drinkable without modification. The British newspaper The Times reports that a Japanese food company is offering a smooth-sipping variation of Japan's favorite condiment.
The convenience store chain Lawson sells this fine chilled beverage which some eccentric people online find to be unpalatable. Sadly, the packaging reveals a tragedy: this drink is just made to resemble mayonnaise in flavor and texture. It's not real mayonnaise yet. But perhaps, as Thomas Aquinas argued that the human ability to conceive of a highest possible form made that form possible, a real mayonnaise drink will soon be within our grasp.
-via Dave Barry