They are at Whole Foods, and you can order them on-line. The classic
neti was from the Himalayan Institute, for Yoga use. We have also
ordered plastic neti pots: SinuCleanse, much easier for traveling. In
my opinion they are far superior to the bulb syringe due to the ease of
cleaning and the consistent delivery of the irrigation. If you want to
use a syringe product, I'd recommend the NeilMed bottle, which is sold
on-line or at many drug stores: including Walgreens and Longs, their
website lists all of the retailers.
 The porcelain neti pots at Whole Foods are the classic neti for 18$
or some really huge one that looks like a watering can for a little
less.
 I use the porcelain one for regular use, and the plastic SinuCleanse
for traveling. My daughters use the plastic ones because they live in
college dorms and they're not breakable.
 Here's a website of a Family Practice Article about Neti Pots and
instructions for use:
http://www.annfammed.org/cgi/content/full/4/4/295
If you download the supplemental info, it's about the technique about
how to use the neti pot. There were several comments posted about neti
vs. pulsatile irrigation, and the authors responded that there are no
clear answers and there is debate about the delivery system and what to
put in the irrigation: hypertonic vs. isotonic, dead sea salt vs.
kosher salt. They recommend patients trying various variations "within
safe parameters."
 I'm a neti pot user. Others who post here are NeilMed users or
Grossan irrigator users. I'd agree with the authors, whatever works for
you. I don't like bulb syringes because they can't be cleaned well and
are breeding grounds for water-loving gram negative bacteria.
Judy