1. SAFE FOOD GRADE MATERIAL: food cube container is made of professional quality food grade silicone material which is odorless, BPA-, and for the all family to use. The smooth silicone surface makes it easy to clean, dishwasher, zer, oven . Not microwave- due to the stainless-steel frame 2. REINFORCED FRAME: The soup storage container is reinforced with a stainless-steel frame for extra stability, the soup zer cube will not tilt when you fill it with liquid diets. You can put the zer tray in the refrigerator without tilting 3. PERFECT SERVING SIZE,EASY TO STACK: The soup silicone zer tray has 2 fill lines: 125ml/4oz and 250ml/8oz in each individual separate compartment, making portioning broth, soup, sauce, and other measured liquid meals easier and more convenient 4. LARGE FREEZING TRAY WITH LIDS: The reusable silicone zer soup container comes with clear tight-fitting lids that provide an airtight seal that keeps your stored food fresh by preventing zer odors and foreign taste while remaining easy to open