This durably built 0.9-gallon Korean container is designed for fermenting kimchi, sauerkraut or pickles and is a breeze to use. The double lid locks tightly and is effective for containing odors, while the sturdy polypropylene construction scrubs up beautifully. The inner vacuum lid sits snugly on top of the fermenting products, preventing oxygen contact, which can lead to mold growth and spoilage; it also has a small covered valve that you can unseal to vent carbon dioxide buildup during fermentation.