Teeling Single Malt Irish whiskey is a blend of aged single malt Irish whiskeys from lots acquired from another distillery. This is a common practice in the scotch whisky world and creates a "vatted malt" style of Irish whiskey. The aging is finished in a combination of wine casks, including sherry, port, madeira, burgundy, and cabarnet sauvignon. This is a remarkable adventure in finishing malt whiskey and they suggest looking for flavor notes of citrus, vanilla, and cloves among others. The whiskey doesn't carry an age statement (one might see it referred to as a NA or "no age" whiskey) but some of the single malt blend is said to be as old as 1991.
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.