These food storage boxes are made of BPA-free, food-grade silicone. Comes in 3 sizes. Airtight covers make the silicon box great to keep dry or wet food. They can also be put into a microwave, or freezer safe. Great for storing leftovers in the fridge and microwavable. They are collapsible and stackable food storage boxes, convenient for storage and reuse.
Note: Open the breathable cover when you heat in the microwave.