Corning Ware blue and white casserole dish #casserole #cooking .. This is a vintage CorningWare Blue Cornflower square casserole dish featuring the iconic blue floral motif and a clear glass Pyrex lid.Material: Made of durable Pyroceram glass-ceramic designed to withstand sudden temperature changes.Design: Features the classic, mid-century Blue Cornflower stamp introduced by Corning in 1958.Usage: Safe for use on stovetops, in ovens, and under broilers (excluding the glass lid