Here is some info from this site
Watkins Extracts And Flavorings : Independent Watkins Associate Melody Thacker
What is the Difference Between an Extract and a Flavor?
I often get asked, "What's the difference between extracts and a flavoring?" The names are often used interchangeably however, an extract is generally made from a natural ingredient, for example we have Pure Lemon Extract from made from lemon oil and Pure Vanilla Extract made from real vanilla beans. Pure extracts can have a more limited shelf life and should be stored in a cool, dark cupboard. A flavoring is usually artifically flavored, therefore it's more stable and has a longer shelf life. Watkins offers you both artificial flavors and pure extracts so you can choose the one that's right for you. The quality and care Watkins takes in the manufaturing process ensures you that the bottle of extract you
buy today, will be just as good six months or several years from now.
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Watkins All Natural Pure Extracts
These fat-free liquid extracts are economical to use as they are concentrated and add a full, rich true-to-life flavor to a variety of dishes, baked goods and beverages. These all-natural extracts do not contain any artificial coloring and are made from all-natural oils. Available in a 2 oz plastic tinted bottle which protects it from light.
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So it sounds like their Extracts are Oil Based Flavorings.
Here's My Opinion.
I don't think Oil Based Flavorings should be Vaped. The Jury is Out on the Health Risks involved with using ANY Oil Based Flavorings.