Take a piece of wood -- just a piece of 1" stock--- on the back side affix a couple of the saw-tooth type picture hangers. If you want you can just drill a couple of holes at an angle that will slide over a nail at the same angle on the wall.
Drill a couple of small holes in the board and run a piece of clothes hanger wire through them, making a loop larger than the stopcock part of the funnel, but smaller than its widest girth. Hang this on a couple of nails in the wall, and pay attention to what you are doing.
Ghetto as its gets, and it works.
Use a piece of wood longer than it is wide, put your picture hanger at the top and the wire through the lower half of the board, and it will hang just fine from one nail. Just make sure you hit more than sheetrock when you drive the nail in.
When you are done, just put the board in your kit and hang the picture back on the nail.