12-piece set includes a 9cm square bowl, an 11cm square bowl, a 14cm square bowl, a 17cm square bowl, a 20cm square bowl, and a 23cm square bowl, each with a lid Shatter-resistant tempered glass is 100% hygienic non-porous and 100% non-cutting Can withstand sudden thermal shock from -4F (-20C) to 212F (100C), so they can go straight from the refrigerator to the microwave Dishwasher, freezer, and microwave safe Resilient design will maintain the original look for years