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

Myeongdong Station Store (134-1 Toegye-ro), both open 10am–10pm. Bigger stores make kitchenware easier to find. The 100ml multipurpose glass jars (6 pack) are ₩2,000, also handy for jam or nuts. Wrap glass in clothes before packing.