This mixing bowl set features high-quality food-grade stainless steel and BPA-free plastic lids. They are designed with deep, splash-resistant shapes and airtight lids for freshness. They include five stackable sizes (4.5, 3, 1.5, 1, and 0.7 quarts) for efficient storage. The price drops from $69.99 to $17.99. Shipping is free for orders over $35, or it adds $6.99.