Case Size: 1/0.5 gal. Kikkoman Gluten-Free Soy Sauce offers a savory, umami-rich flavor without wheat, perfect for gluten-free dishes. Kikkoman Gluten-Free Soy Sauce (1/2 gallon) is an authentic soy sauce with a rich, savory flavor, perfect for gluten-free dishes. It offers the same depth and umami as traditional soy sauce, making it an ideal alternative for those with dietary restrictions.