Have the barista scan your Starbucks app when ordering your first drink to get a free refill. You must get it within one store visit, making Target a perfect place for the perk.
However, Target locations may have rare merchandise since they can order as many items as they want, whereas regular locations automatically have products shipped to them.
Place a Drive-Up order for an in-store product in the app. Once you're notified that your item is ready to be picked up, you'll be prompted to place a Starbucks order if desired.