A medical device , comprising: an application device having a first fluid path therethrough; a container movably attached to the application device, wherein the container and the application device have a second fluid path therethrough, wherein the container includes an inner chamber that is intermediate proximal and distal portions of the second fluid path, wherein the inner chamber is fluidly isolated from the proximal portion of the second fluid path at a first position of the container, and wherein the inner chamber is fluidly coupled to the proximal and distal portions of the second fluid path at a second position of the container, wherein the first fluid path bypasses the container, and the passage of fluid through the first fluid path is separately controllable from the passage of fluid through the second fluid path, and a second container including a propellant fluid and configured to be attached to an inlet of the application device, characterized in that the application device further includes a locking mechanism for securing the second container to the application device, wherein the locking mechanism includes: a lever pivotally connected to the application device and configured to be rotated between a first position and a second position; and a piston connected to the lever and contacting the second container, wherein in the first position of the lever, the second container is fluidly decoupled from the application device, and wherein rotation of the lever in the second position forces the piston against the second container, thereby moving the second container to be fluidly coupled to the application device. an application device having a first fluid path therethrough; a container movably attached to the application device, wherein the container and the application device have a second fluid path therethrough, wherein the container includes an inner chamber that is intermediate proximal and distal portions of the second fluid path, wherein the inner chamber is fluidly isolated from the proximal portion of the second fluid path at a first position of the container, and wherein the inner chamber is fluidly coupled to the proximal and distal portions of the second fluid path at a second position of the container, wherein the first fluid path bypasses the container, and the passage of fluid through the first fluid path is separately controllable from the passage of fluid through the second fluid path, and a second container including a propellant fluid and configured to be attached to an inlet of the application device, characterized in that the application device further includes a locking mechanism for securing the second container to the application device, wherein the locking mechanism includes: a lever pivotally connected to the application device and configured to be rotated between a first position and a second position; and a piston connected to the lever and contacting the second container, wherein in the first position of the lever, the second container is fluidly decoupled from the application device, and wherein rotation of the lever in the second position forces the piston against the second container, thereby moving the second container to be fluidly coupled to the application device. a lever pivotally connected to the application device and configured to be rotated between a first position and a second position; and a piston connected to the lever and contacting the second container, wherein in the first position of the lever, the second container is fluidly decoupled from the application device, and wherein rotation of the lever in the second position forces the piston against the second container, thereby moving the second container to be fluidly coupled to the application device. <EOS>