Harvest Keeper? Glass Jars with Metal Clamp Lid are a vintage looking storage solution for: Herbs, dried fruits and vegetables, spices, cereals, grains, nuts, seeds, pasta, coffee and hundreds of other items! These metal clamp lid jars deliver freshness with an air-tight seal. The metal clamp closure with a gasket provides a strong secure seal with an added touch of charm. Note: Jars do not provide a liquid tight seal. Hand wash only.