This vintage Corning Ware casserole set with blue cornflower pattern is a true mid-century modern gem.  United States  They are perfect for  serving your favorite dishes and keeping the left overs in the fridge. They are glass-ceramic (Pyroceram),  oven-safe, and microwaveable with lids. This original Corning Ware pieces are part of the blue cornflowers product line. The printed back stamps indicate that they are authentic vintage items. Vintage, but still match the other cornflower pattern in your kitchen.