1. Stackable and lightweight design for easy storage. Microwave-safe, containers can be reheated or frozen. 2. Thoughtful design: Make sure this set of containers meets all your needs. Suitable for: packed lunch, take-out and delivery. Prepare hot or cold meals: salads, sandwiches, snacks, fresh fruit, dips, breakfast, lunch, dinner, leftovers and kids' meals. Preparing meals hassle-free, the durable design of our food preparation containers has high bend, twist and temperature tolerance, plus our airtight, leak-proof LIDS seal tightly to keep your food safe. 3. Wear and wear resistance: Hard plastic construction will ensure no cracks or breaks along the way. Leak-proof LIDS will tightly seal food containers for meal preparation, preventing any annoying leaks or leaks in your bag or refrigerator. 4. Refrigerator safety: Prepare and pack your food ahead of time. These food containers with LIDS keep the fridge from burning and absorbing other odors in the fridge. Note: When freezing, do not try to squeeze into a narrow space, or it will burst. Make sure it has thawed out before removing the lid, although a small amount of warm water will balance the air pressure so you can remove the lid.