Case Size: 1/18 oz. Lee Kum Kee Vegan Oyster Flavored Sauce is a plant-based sauce that mimics the umami-rich flavor of oyster sauce. Lee Kum Kee Vegan Oyster Flavored Sauce (18 oz) delivers the same rich, savory flavor as traditional oyster sauce, without the use of oysters. It is ideal for seasoning stir-fries, soups, and marinades in vegan and vegetarian dishes.