Richy,

Beer companies get there bottles from wholesale distributers.
Wholesalers do not sell to the general public and most have high
minimum orders. If you want to buy from a wholesaler (their prices
will be at least 50% cheaper than your LHBS, if not more) you have to
do two things. First, you have to have business tax id. The only way
to get that is to create your own sole proprietorship and register with
the IRS. Second, you then have to place find a wholesaler with a low
minimum order (expect at least $100) and one that is willing to ship to
a residential address. To make a long story short, it is possible but
probably only worth it if you already have a small business.

John