All our jars are made from recycled glass. Our bamboo jar lids come equipped with a silicone ring, making them ideal for storing loose leaf tea, dried herbs, or anything else that might benefit from an airtight seal. Available in a variety of colors and lid designs. - 12oz jar: 4.375 inches tall x 3.25 inches wide - Materials: recycled glass & bamboo - Not intended for home canning* - Hand wash only