4 Packs not 3 Packs! SAFE AND HEALTHY. Our lunch box is made of premium 100% food grade silicone materials. It's BPA free, non-toxic odorless, non-stick, leak-proof, easy to clean, and very safe. The silicone lunch box can endure temperature from -40°C to 240°C. It's suitable and safe for microwaves ovens, and refrigerators, dishwashers.

4 Packs Size: 350ml:13.5*10*6.6cm; 500ml:16*10.5*6.8cm; 800ml:18.5*12*7cm; 1200ml:21.5*13.5*7.6cm. Height after folding: 1.18inch/3cm. Color: Blue. The food storage set have 4 different size. Small sizes can be used for nut, fruit, soup, candies. Bigger sizes are perfect for sandwich, salad, pizza, or meal.

Space Saving. This silicone lunch box set is collapsible and easy to fold. Each of them can be fold to 3cm(1/3 of its original size). They can help you save 60% space so that you can organize them easily. There is a air vent on the lids for microwave heating. The premium sealed ring and snap are leak-proof and can keep your food fresh.

Wide usage: The container set are good choice for no matter indoor or outdoor use like food storage, lunch box, bento box, picnic, travel, hiking, camping, travel and more. It's also perfect for storing no matter dried foods or wet foods like nuts, leftovers, fruits and so on.