The past week has seen a lot of news for coffee companies Starbucks (NASDAQ:SBUX) and Green Mountain Coffee Roasters (UNKNOWN:GMCR.DL). Investors in these two stocks experienced large gains because of optimistic earnings from Starbucks and a new partnership between Green Mountain and Costco Wholesale (NASDAQ:COST). The single-serve segment, however, is facing increasing competitive pressures, and over the next few years, investors will need to pay attention as the storyline plays out. Watch the following video as David Williamson and Blake Bos go over this past week's events.

Blake Bos and David Williamson have no positions in the stocks mentioned above. The Motley Fool owns shares of Costco Wholesale and Starbucks and has options on Green Mountain Coffee Roasters and Starbucks. Motley Fool newsletter services recommend Costco Wholesale, Green Mountain Coffee Roasters, and Starbucks. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.