Upon further examination of the product, it is made by a company called "Stirrings". I had orignally thought it was a williams sonoma brand, but clearly it is not. Reading the ingredients, it is made with cane sugar. I recall reading elsewhere on here that this was preferred to corn syrop. They have a website www.stirrings.com
they have a few bitters and essences to choose from, plus a large number of pre-mixed martini type concentrates.