El-Cheapo way,
Get a wood board, plywood or whatever.
Width needed depends on size of your funnels.
Make round holes and a slot to one side.
Again, hole size depends on size of funnel.
Pickup a couple of shelf brackets and bolt it to
Your Wall.
You can hang as many as you want.
If your exhaust fan vibrates the wall a little,
You can even get the dildo effect, no extra charge.