You need to read the latest news on SBUX and GMCR. What you stated is the least of GMCR's worries.
Starbucks is coming out with a new machine, mainly for making espressos and GMCR shareholders are flocking out of the shares like sheep. There is no real reason to sell and it will be a buying opportunity. GMCR is quite volatile*, so if you get involved, you were warned.