Abstract: Disclosed herein is an apparatus for facilitating transferring fluids between containers, in accordance with some embodiments. Accordingly, the apparatus comprises a first container and a regulator. Further, the first container contains a first fluid at a first pressure and transfers the first fluid to a second container. Further, the second container transfers the second fluid to a third container based on the transferring. Further, the second pressure is greater than a third pressure of a third fluid contained in the third container. Further, the regulator is operatably coupled with the first container. Further, the regulator controls a mass flow rate of the first fluid transferred from the first container. Further, the transferring of the first fluid to the second container is based on the controlling. Further, the controlling facilitates maintaining a differential pressure between the second pressure and the third pressure within a differential pressure range.