1.[Solid Materials]: all-temp glass food storage container is made from high borosilicate glass, which is heat-resistant and non-toxic. The lid body is made of MS material, and the four locking clips are made of PP material, ensuring durability and for long-term use. 2.[Multi-Functional Design]:This Glass Meal Prep Container is suitable for the zer, dishwasher, microwave, and oven (please remove the lid before heating). The glass can withstand temperature differences from -20°C to 400°C, while the lid can withstand temperature differences from -10°C to 80°C, making it perfect for various storage and heating needs. 3.[Convenient Stackable]:4 PACKS GLASS MEAL PREP CONTAINERS: With 4 packs 13oz (5.9 in x 4.3 in x 2.4 in) single compartment food Prep Containers with Lids, They are great for meal prepping. 4.[Easy to Clean]:The removable rubber seal allows for thorough cleaning, maintaining the hygiene of the container and preventing odors and bacterial growth.