This two jar set of 16 oz wide mouth jars are compatible with the Chrono Clean Watch Cleaning Machine (sold separately). The jars allow you to have matching jars for your rinse solutions or can be used for other watch cleaning solutions. The two jar set includes two high quality wide mouth 16 oz/1 pint glass jars with metal screw on lids. These jars protect from harmful fumes present with watch cleaning solutions. Contents: Two 16 oz/1 pint wide mouth glass jars Two threaded metal (one-piece) lids Note : Not intended for canning food