Oakleaf, did you see the NeilMed neti pot? It comes with a lid and when you want to regulate the flow, you place your finger over the hole on the lid.
Huh, no, I haven't seen those. That might be useful when I'm really stuffed up. OTOH it might just mean it would take an hour for the solution to trickle through my sinuses drop by drop I'm having visions of those old Taco Neck commercials.