It is listed under LD Carlson (Item 3764A/11671-TTB 181). Type: A concentrated liquid flavoring.
Based on the search results, "Flavor 181" appears to refer to a . Product: Natural Caramel Flavoring Extract (128 oz). flavor181
Note: There was also a reference to "flavor181" being part of a Tea Bomb custom energy drink event in Winsted, suggesting "181" might be a flavor number in a local, custom menu. It is listed under LD Carlson (Item 3764A/11671-TTB 181)