Coffee concentrate. Just add water. Makes 8 glasses of cold brew coffee. Your favorite cold brew is now easy to make at home with new starbucks cold brew multi-serve concentrates. Just mix with water and ice for a taste thats smooth delicious and perfectly yours. We ve cold-steeped our custom blend of medium-roast coffee luring out subtly sweet chocolaty notes into this rich concentrate. It s perfect for those of us who love a cold glass of cold brew coffee but don t have the time to wait.