To take advantage of the program, you'll have to ask your Starbucks barista for a iced sampler card. Then, every time you buy a Grande iced coffee or tea, you'll get a sticker for your card (be sure to ask if they forget to give you one).
Once you collect five stickers, you can redeem the card for a free Grande iced coffee or tea of your choice.
You can earn stickers at participating Starbucks locations through August 8, 2016 and can redeem your card until September 5, 2016.
Photo via Starbucks.