This excerpt taken from the GMCR 10-K filed Dec 14, 2006.
Because a substantial portion of Green Mountain Coffees revenue is related to sales to certain major customers, the loss of one or more of these customers could materially harm our business.
Our Company receives a significant portion of revenue in each fiscal period from a relatively limited number of customers, and that trend is likely to continue. Coffee pounds shipped by GMCR to our ten largest customers accounted for approximately 37% of total coffee pounds shipped by GMCR in fiscal 2006. The loss of one or more of these major customers or a decrease in orders from one of these customers could materially affect our business. In addition, a significant percentage of our total revenue in fiscal 2006 came from sales of K-Cups®. If competitive, business or economic factors had a material negative impact on sales of the Keurig brewing system, our business would be adversely affected.