From left, Miranda Giambi, 11, of Chevy Chase, Mary Rose Bell, 12, of Alexandria, and Priya Phillips, 11, of Bowie
Inspiration: They decided to make the costumes because they all love Starbucks and could represent different sizes -- venti, grande and tall. They also represented all of their favorite drinks.
Supplies: Felt, iro-ons for logos.
Grown-up help: Mary Rose's dad helped measure, which was tricky because the cups get smaller toward the bottom.