Porcelain Storage Containers (Set of 4) for $25.59 after promo code EXTRA20. Shipping is $7.75 for a total of $33.34 shipped, or free on orders over $49 with promo code SHIP4FREE. Here is a screenshot for reference. The food container set is made of white glazed porcelain, dishwasher, freezer, microwave and oven safe to 600°F. Each container has a lid with four-hinge locking mechanisms and silicone gaskets.