Improve your daily food storage quality with this durable food storage container set with airtight snap lock lids. Each storage container is made of high-quality plastic material which makes it BPA-free and great for fridge to microwave heating (lids are not microwaveable). KEY FEATURES These multi-functional containers do not bend or warp when used in the microwave or stored in the freezer. Stays fresh, no mess: Enhanced silicone seal is 100 percent airtight to keep foods fresh longer and 100 percent leakproof to prevent unwanted drips and spills.