Refer to the input text as context and select the correct relationship between 'Starbucks' and 'coffee' from the available options.
Options: operator, product/material produced, currency, distributed by

Last year, they consumed 90 million gallons of ready-to-drink coffee beverages, ranging from bottled Starbucks Frappuchinos to cartons of Stumptown cold brew, up 52 percent from 2009, data from Beverage Marketing Corporation show.
product/material produced