The present invention is to provide a backflow prevention apparatus of a clean room for solving a negative pressure point in the clean room so as to prevent a backflow from underfloor of the clean room. Specifically, performance and configuration data from different storage components is collected and analyzed to identify nodes that are becoming performance bottlenecks. Each of the memory cells further has a MOS transistor and two ferroelectric capacitors coupled together in series to have a common node to couple with the transistor, and two plate lines coupled with two non-common nodes of the two series ferroelectric capacitors, respectively. In other embodiments, a vial comprises a bag for regulating pressure within the vial as liquid is removed therefrom.