Tall, grande, venti—cups for each drink size have mysterious lines on the sides. What exactly are those markers used for?

Coffee and drinkware giant Starbucks just released nine new merchandise pieces for spring, including tumblers, cold cups, ...

Starbucks recently introduced new compostable cups in select states, including California, aiming to reduce plastic waste. While some students applaud the eco-friendly change, others are less than ...