The company said if customers buy their "Via" instant coffee and don't think it's as good as the /*Starbucks*/ bagged coffee, they'll send some coffee for free.
Starbucks said customers just have to send them the U-P-C code from the "Via" coffee, their receipt, and fill out a form on the internet. They will send a free 12 ounce bag of Starbucks coffee.
The promotion starts Tuesday and runs until Aug. 31.