Case Size: 12/18 oz. A vegan-friendly oyster-flavored sauce made from mushrooms, providing rich umami taste for various dishes. Lee Kum Kee Vegan Oyster Flavored Sauce (18 oz) offers a plant-based alternative to traditional oyster sauce, providing the same deep, umami flavor without any animal products. Ideal for stir-fries, sauces, and marinades, it’’s perfect for vegan and vegetarian cooking.