Teeling Single Grain Irish Whiskey is aged not in ex-bourbon barrels—which is what is done in the great majority of Irish whiskey—but rather in ex-Cabernet Sauvignon red wine barrels. This gives their whiskey, in their words, a "very distinctive rich amber colour while imparting strong spicy notes and lush red berries and grape flavours." The whiskey itself is a "predominately" corn grain base, which to us suggests a style of clean, sweet-styled whiskey similar to bourbon.

The Teeling Whiskey Company was founded on the concept of creating alternative Irish whiskey that has more personality and flavor than what they call the more "accessible" competition. It was founded on the Teeling family name, who claim a whiskey heritage going back to 1782 though the modern company was founded much more recently by Jack Teeling (son of John Teeling of the Cooley Distillery). Their company is blending, aging, and bottling whiskey from different sources much in the style of scotch independent bottlers and we note Teeling as the producer for that reason.