Utilize the input text as a context reference, choose the right relationship between Starbucks and coffee from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

But when coffee prices drop unexpectedly, as they did this year, these advance strategies can have some negative short-term consequences: It's likely that Starbucks paid more than the current spot market price for coffee stocks, which would be reflected in future financial statements.

Answer: product_or_material_produced