1. **Set of 4 & Safe Silicone Material:** The set includes four collapsible food storage containers: two square (350ml and 500ml) and two round (350ml and 500ml) boxes, catering to diverse food storage needs. Each container is crafted from superior, BPA-free, food-grade silicone, known for its softness, durability, and non-toxic properties. 2. **Airtight Storage and Space Saving:** The snap buckles and vent valve create an airtight seal, preventing dust and preserving food freshness for extended periods. These collapsible containers are designed to fold, saving approximately 50% of space during storage. 3. **Microwave, Freezer, and Dishwasher Safe:** These containers are safe for use in the dishwasher, freezer, and microwave. They can withstand temperatures ranging from -4°F to 428°F (-20°C to 220°C). *Tip: Before microwaving, ensure the vent valve on the lid is pulled up or the plug is removed.* 4. **Multifunctional:** This set of four collapsible meal prep containers, comprising square and round shapes in small (350ml) and medium (500ml) sizes, offers versatility for various applications. They are ideal for storing cereal, fruits, vegetables, and leftovers in the refrigerator. They also serve as convenient lunch boxes for office workers. Additionally, they are perfect for carrying food during travel or camping.