It is commonly found in the baking aisles of supermarkets because it is also used as an ingredient in coffee cakes and other confectionery.
It includes a drawing of a seated Gordon Highlander (supposedly Major General Sir Hector MacDonald)[5] being served by a Sikh soldier holding a tray with a bottle of essence and jug of hot water.
That was also the motto of the 59th Scinde Rifles (Frontier Force) of the British Indian Army.
In this context, the Scots word 'aye' has the meaning of 'always' rather than 'yes',[6] and indicates, in the case of the drink, that it is 'always ready' to be made.
The original label, by William Victor Wrigglesworth, depicted a Sikh servant waiting on a seated Scottish soldier.
A later version of the label, introduced in the mid-20th century, removed the tray from the picture (thus removing the infinite bottles Droste effect) which was seen as an attempt to avoid the connotation that the Sikh was a servant, although he still waited while the kilted Scottish soldier sipped his coffee.