Fresh food really does stay fresh for a long time in the masterseal fresh box food storage containers. Thanks to the distinct freshness seal in the lid, not only are these plastic storage containers up to 100 percent leakproof, but they are also 100 percent hygienic as there are no gaps for germs to form. Because the masterseal fresh box containers are bpa-free, they are completely safe for baby food, suitable for the fridge, freezer, microwave and for use as a healthy lunchbox on the go.