Glasslock containers are made of silica, soda ash, limestone, and other natural components, making them eco-friendly and recyclable. They're BPA-free and do not contain any harmful environmental hormones. These containers' transparent and clear glass design makes it convenient to identify the content and will look great in any kitchen. Glasslock delivers the flexibility of using it for the microwave, freezer, dishwasher, and oven. They're odor-free, stain-proof, as well as protected from air and liquid. These containers come with easy-latching lids that bring more convenience to storing your food.