Silicone zer molds are made of food grade silicone with BPA-free construction (lid excluded) and a temperature range from -40 F to 446 F. They are safe to use in dishwashers, ovens, and microwaves. The silicone zer tray with a cover adopts an internal stainless steel frame design, which keeps the tray sturdy and helps it maintain its shape without tilting or collapsing when transferring to the refrigerator or stacking. The zing tray has anti slip handles at both ends for easy carrying and handling. The plastic lid fixed to the tray provides tight compartments that prevent odors from mixing between foods in the refrigerator and reduce cross transfer during tray movement. Plastic lids offer better sealing and leak resistance than silicone lids, and they do not collapse during refrigerator stacking. Each silicone food mold compartment includes 1 cup (250 ml) and 2 cup (500 ml) filling lines to guide precise portion sizes. The mold size is 11.41 inches long x 5.31 inches wide x 2.36 inches high, making it suitable for any size of microwave and oven. Use scenarios - Meal prep and portion control: freeze weekly meals in exact 1 cup or 2 cup portions for quick reheating. - Baby food and purées: create uniform portions for easy, mess-free feeding. - Stock, sauces, broths, and smoothies: freeze in defined portions for fast, convenient meal assembly.