You can use the inci name or the common name. For instance you can use Chamomile Extract. When using a preservative you do do have to use the inci. You can't just label it Phenonip for example.
Aztec is in Knoxville, Tennessee and they have these for $6.75 a case including the lids. They actually give you several lid choices. http://www.buywax.com/product.asp?specific=jqoogor0
Neither do I but I love this. Want a soap sniffie? I have one bar left from my test batch. I can send you a slice of it and let you smell for yourself.