The stage includes two channels each connecting an input to an output. The carton can be separated into two portions or trays, each of which can be converted into a tray for heating a food item in a microwave oven. These defined uplink and downlink transmission periods can be adjusted based on bandwidth and latency considerations on the network link. The flexible bag is made from a mesh, through which contents of the flexible bag are visible. The MEMS switch can be designed into various architectures, e.