This strong porcelain set will take everything you have to dish- literally! Constructed for everyday use- designed for timeless beauty. This strong porcelain set will take everything you have to dish- literally! Constructed for everyday use- designed for timeless beauty. Your life just got easier! These are microwave, freezer, and oven safe (up to 400°F). So, reheat, bake, or even chill with confidence. It's high firing temperatures creates a glass like surface making these bowls Impermeable to moisture, odors and color.