The original sandy brown colored container for foods with strong color The Perfect fermentation and storage container combining the ancient Korean Onggi principle with modern andeasy-to-use technology It protects the surface of the food and the crispy texture and vibrant color are maximized. The adjustable inner vacuum lid to minimize air inside, keeps the food fresh and slows down decomposition process. High quality polypropylene plastic mixed with 7-10% natural clay for optimal porosity. The CKC Fermentation Container combines the ancient Korean Onggi (earthenware) principle with modern, easy-to-use technology. Onggi dates back to 57 BC and is referred to as the “breathing pot” because of its unique porosity, and it is known as an excellent vessel for fermented foods like kimchi and pickles. Although Onggi is amazing, it's difficult to use in a modern home environment because it is very heavy, difficult to clean and awkward to keep in the fridge. The CKC Fermentation Container was developed to solve those problems while maintaining the ingenuity of Onggi. It is made from high quality polypropylene plastic mixed with natural clay. The inner vacuum lid is easily adjusted according to the level of food. So regardless of the amount of food, the container It protects the surface of the food and the crispy texture and vibrant color are maximized.