What Flavor is Sneak Attack?

I was looking up some lore information as a spring board to develop my DnD character today, and I saw an ad on one website for DnD themed Jones Soda. Which strikes me as odd. So a quick hop, skip and Google search later. And it appears to be legit.

DnD Spell-casting Soda, is an actual product. Found here.

Although my concern would be: what flavor is sneak attack supposed to be?