On The Rocks Old Fashioned is a bartender-crafted, ready-to-drink cocktail that stays true to the classic recipe. Made with Knob Creek® Small Batch Bourbon Whiskey, bitters, cane sugar, and orange, cherry, and lemon flavors, it delivers the strong, balanced simplicity of a bar-made Old Fashioned without any mixing required. Costco sells this in a case of six 750ml bottles.

To serve, simply pour over ice and enjoy. The cocktail mellows beautifully over ice, offering a rich bourbon profile with just enough fruit and sweetness to round it out without being cloying. It earned a Gold Medal at the 2024 San Francisco Ready-To-Drink Competition, and is produced by On The Rocks (OTR) Cocktails, a brand under Suntory Global Spirits.