The BUYDEEM glass jars keep food safely sealed and stored in the refrigerator or cupboard. They are also an aid in planning and implementing a healthier diet. The key design feature is the lid: it has a double-layered seal to ensure no leakage and to lock in the fresh taste of the food. Secondly, the edge of the lid is designed to allow for multiple vertical stacking. Thirdly, they are incredibly easy to open. Finally, the borosilicate glass material can withstand temperature changes of up to 150 degrees.