A shelf lined with large apothecary jars runs the length of Grapevine Olive Oil Company's airy shop. Of course, the shop is not a pharmacy, and the jars don’t contain medicine—the stainless-steel containers are actually fustis, which preserve olive oil for shopkeepers to dispense samples. The shop houses dozens of eclectic flavored oils and vinegars, such as Persian-lime olive oil, espresso balsamic vinegar, and—the owner's favorite—wild-mushroom-and-sage olive oil. The olive oils come from all over the world, though each vinegar hails from the storehouses of Modena, Italy. To simplify the diverse selection, shopkeepers can suggest recipes and blends of the dressings—basil olive oil paired with fig balsamic vinegar goes well with pastas, for example, and blood-orange olive oil and tangerine balsamic vinegar turn into an edible shampoo.