Methods, systems, and devices are described for allowing a decreased pressure within a liquid reservoir to develop. The liquid reservoir may be sealed to create the sealed reservoir. During the sealing process, a potential headspace within the liquid reservoir may be decreased while ambient pressure is maintained. Pressure may then be decreased by draining liquid from the liquid reservoir and air is prevented from entering the headspace of the liquid reservoir.提供降低液體貯存器內壓力的方法、系統和裝置。將液體貯存器密封以建立密封貯存器。在密封過程中，可減少液體貯存器中的潛在頂部空間，同時維持環境壓力不變。接著從液體貯存器排出液體使壓力減少，並避免空氣進入液體貯存器的頂部空間。
