In Myeongdong, go to Daiso Myeongdong Main Store (43 Myeongdong-gil) or

Myeongdong Station Store (134-1 Toegye-ro), both open 10am–10pm. Want to personalize it? The white decorating pen (데코펜, 20g) is ₩1,000 with 13K+ orders, for writing on the snacks or the box. Food shelves are laid out differently in each store, so ask staff if you can't find them. Write a coworker's name or "Thank you" for a nice touch.