Harvest Keeper® HumiGuard® Clamp Sealing Stainless Steel Containers are a great storage solution for herbs, dried produce, spices, seeds and dozens of other items! These food-grade Stainless Steel HumiGuard® Clamp Sealing Containers deliver freshness with an air-tight seal. The metal clamp locking closure ensures the 1/4 in wide silicone gasket provides a strong, secure seal to ensure air-tightness. The underside of the lid features a built in pack holder that is specially designed to hold a 4 gm, 8 gm or 67 gm Integra Boost® humidity pack (sold separately).