Safe Use - Our glass storage containers are made of food-grade high borosilicate glass, which is not only lead-free and non-toxic, but also extremely durable, suitable for temperatures ranging from -4 F to 248 F. The lid is made of natural bamboo, not only enhancing practicality, but also blending well with various kitchen styles. Better Seal with Elastic Silicone Ring - The glass storage jar with an airtight lid uses a natural bamboo lid and an elastic silicone seal ring to create a better airtight space, extending the freshness and storage time of food. In addition to practicality, these uniquely designed jars can also serve as decorative pieces, making them perfect for housewarming and wedding gifts. One Hand Grip - The thoughtful rectangular design makes it easy to grip with one hand and reach from high cabinets. Additionally, the narrow width of the rectangular edges makes pouring more controlled and greatly reduces the possibility of spills.