Drink to that Mother
Participating stores are offering hot or iced brewed coffee or tea. Those without reusable mugs can purchase one (of course) at Starbucks stores today for 20 percent off. (Customers who bring in their own mugs and tumblers get 10 cents off their drink price at Starbucks every day, year round.)
The size of qualifying mugs was unspecified — Trenta, anyone?