I hated the water running out of my nose and straight into my mouth with the NetiPot, so I got one of these:
LINK and it works perfectly.
Talked to my Doc about it and he said use it as often as I am comfortable, BUT.. and he really stressed this, he said to either microwave or boil the tap water before I flush out the sinuses. He says that tap water is treated to be safe to drink but not to be squirted up into our sinuses.
I have a SteriPen that I use to zap the water with UV before each use and it works just fine.
I snore terribly, so flushing the sinuses out and the occasional BreathRight strip seem to help.