Hello Blue_Sky, Southern Belle is right on. There are a number of web sites all with pricing and ordering info; some also have info on local sources of supply. Also check out your local health food store. I buy a 1 liter bottle of Hydrated Bentonite
for $18 USD in my local health food in a small town in west central Missouri. I haven't used the charcoal, but the Bentonite
is a wonderful product.
Good health to you