The Progressive ProKeeper+ 4-Piece Airtight Pantry Storage Set boasts superior construction and a silicone seal that ensures airtight storage. Its stainless steel clasp also guarantees ingredient longevity. The three containers are designed to sustain the freshness of their contents for extended periods. Additionally, each canister features measurement markings to provide a clear view of its internal contents. Furthermore, the ProKeeper food storage containers are dishwasher safe for effortless cleaning.