Take context from the input text and decide on the accurate relationship between 'Starbucks' and 'coffee' from the options provided.
Options: owner of, owned by, product/material produced, stock exchange

Gourmet coffee shops are opening quickly and java giant Starbucks Corp. SBUX 0.03 % plans to grow from 1,700 stores on the mainland to 3,400 by 2019.
product/material produced