An intravascular device comprising: (a) a delivery catheter having a proximal end, a distal end, a non-circular lumen, said delivery catheter capable of (i) moving within a blood vessel to a target aneurysm, (ii) stopping proximal to said target aneurysm, and withdrawing from said blood vessel, (b) a packaging catheter, a pusher wire or a hypotube having a proximal end, a distal end, and a differentially porous occlusion device releasably disposed on said distal end of said pusher wire or hypotube, (c) a hub having a delivery-catheter port and a packaging-catheter port, said packaging-catheter port being adapted to receive said distal end of said pusher wire or hypotube, wherein said packaging-catheter port is capable of receiving said distal end of said pusher wire or hypotube in at least two orientations, (d) said pusher wire or hypotube capable of slidable passage of said occlusion device through said non-circular lumen, such that said pusher wire or hypotube substantially maintains said orientation relative to said delivery catheter during movement of said distal end of said pusher wire or hypotube through said blood vessel to said target aneurysm, (e) the pusher wire or hypotube, the packaging catheter and delivery catheter have a matching geometrical shape, with the packaging catheter and delivery catheter, excluding the hub, having similar inner dimensions, such that the pusher wire or hypotube fits snugly, but slidably, into the packaging catheter and delivery catheter, fitting in a lock-in-key fashion, so it can advance within said catheters, but cannot rotate in said catheters,; the packaging catheter is configured to be rotated at various angles relative to the delivery catheter and its hub and to be joined to the hub, to be properly oriented in the packaging catheter hub port, in order to achieve the desired orientation of the occlusion device when it is transferred from the packaging catheter to the delivery catheter, by advancing the back of the pusher wire or hypotube, which is extending out the back of the packaging catheter. (a) a delivery catheter having a proximal end, a distal end, a non-circular lumen, said delivery catheter capable of (i) moving within a blood vessel to a target aneurysm, (ii) stopping proximal to said target aneurysm, and withdrawing from said blood vessel, (i) moving within a blood vessel to a target aneurysm, (ii) stopping proximal to said target aneurysm, and withdrawing from said blood vessel, (b) a packaging catheter, a pusher wire or a hypotube having a proximal end, a distal end, and a differentially porous occlusion device releasably disposed on said distal end of said pusher wire or hypotube, (c) a hub having a delivery-catheter port and a packaging-catheter port, said packaging-catheter port being adapted to receive said distal end of said pusher wire or hypotube, wherein said packaging-catheter port is capable of receiving said distal end of said pusher wire or hypotube in at least two orientations, (d) said pusher wire or hypotube capable of slidable passage of said occlusion device through said non-circular lumen, such that said pusher wire or hypotube substantially maintains said orientation relative to said delivery catheter during movement of said distal end of said pusher wire or hypotube through said blood vessel to said target aneurysm, (e) the pusher wire or hypotube, the packaging catheter and delivery catheter have a matching geometrical shape, with the packaging catheter and delivery catheter, excluding the hub, having similar inner dimensions, such that the pusher wire or hypotube fits snugly, but slidably, into the packaging catheter and delivery catheter, fitting in a lock-in-key fashion, so it can advance within said catheters, but cannot rotate in said catheters,;