Crazy Korean Cooking Premium Kimchi, Sauerkraut Fermentation and Storage Container with Inner Vacuum Lid, Sandy Brown, 0.9 gallon (3.4 L) 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 High quality polypropylene plastic mixed with 7-10% natural clay for optimal porosity and all components are made with FDA approved materials, free of BPA, DEHP and lead It induces anaerobic environment in which the beneficial bacteria (lactic acid-producing bacteria) thrive and the crispy texture and vibrant color are maximized The adjustable inner vacuum lid to minimize air inside, protect the surface of the food Great for <span class="a-text-bold">kimchi</span> (Korean fermented vegetables), <span class="a-text-bold">sauerkraut, pickles </span> and <span class="a-text-bold">jang</span> (Korean fermented sauces) Double lids <span class="a-text-bold">contain the smell better </span>than most containers <span class="a-text-bold">Induces probiotic fermentation </span>and<span class="a-text-bold"> protects the surface of the food </span>where harmful aerobic bacteria tend to grow. Keeps food fresh longer. Also good for other foods requiring <span class="a-text-bold">airtight storage</span>, such as <span class="a-text-bold">fresh vegetables, coffee beans, bread, seaweed, cookies, cereals, grains, nuts and even dry pet foods. </span> <span class="a-text-bold">Dishwasher safe</span> and <span class="a-text-bold">heat/cold resistant</span> (can handle hot water). You can use it in the microwave <span class="a-text-bold">without</span> the lids. <span class="a-text-bold">High quality durable</span> polypropylene plastic mixed with 7-10% natural clay. It is <span class="a-text-bold">free of BPA, DEHP</span> and <span class="a-text-bold">lead</span>. All components are made with materials that are FDA approved <span class="a-text-bold">Materials:</span>container (PP), inner lid (PP), outer lid (PP), rubber (silicon), handle (PC)