The Pyrex Cook and Freeze rectangular storage set consists of two high-quality borosilicate glass containers. These containers are designed to withstand thermal shock and can safely be used in the oven up to temperatures of 300C (without the lid) . The set includes a 1. 5Ltr and a 4Ltr container. The containers come with lids, allowing for convenient storage of food in the refrigerator and freezer. Additionally, they are microwave safe - ideal for reheating purposes. Cleaning is a breeze too, as the set is dishwasher friendly. The containers are made from scratch-resistant and hygienic material, making them a long-lasting addition to any kitchen.