From the microwave to the table, comes another innovative and completely versatile product by Snapware, the foremost trusted name in food storage. The Glasslock™ Food Storage Container is a clever creation that combines the best features from your favorite plastic and glass food containers. The unique glasslock™ snap lock lid system features a 100% airtight silicone and leak proof seal and is easy to open and close. Crafted from tempered glass, these vessels will not stain, are dishwasher and freezer safe and provide a "green" approach to storing and reheating your food. The Glasslock™ containers feature a tapered design so that they nest inside one another.