Prep ingredients and seasonings for dinner with this stackable bowl set from Luminarc. Made from clear tempered glass, the bowls have a round shape. Use these versatile bowls for preparing ingredients or even to serve dipping sauces. The round shape is also stackable with other Luminarc round glass bowls. Made in the USA, they are microwave safe for reheating and dishwasher safe to make clean up a breeze.