1. Safety: Silicone zer molds is made of food grade silicone without BPA (excluding the lid) and has a temperature resistance of -40 ℉ to 446 ℉. It is to use in dishwashers, ovens, and microwaves. 2. Steel ring top: The silicone zer tray with a cover adopts an internal stainless steel frame design, which is very sturdy, allowing the tray to maintain its shape without tilting or collapsing when transferring refrigerators or stacking. The zing tray is equipped with anti slip handles at both ends, making it easy to carry and use. 3. Amazing sealing: The plastic lid is fixed to the tray, and the tight compartments not only ensure that the odors of food and refrigerator do not leak each other, but also prevent confusion between compartments during tray transfer. Compared to silicone lids, plastic lids have better sealing and leak resistance, and there is no need to worry about collapse during refrigerator stacking. 4. Convenient partial control: Each silicone food mold compartment with 1 cup(250ml) and 2 cup(500ml) filling lines in each compartment, allowing for zing food into precise sizes. Our mold size is 11.41 inches long x 5.31 inches wide x 2.36 inches high, suitable for any size of microwave and oven.