In Myeongdong, try Olive Young Myeongdong (14 Myeongdong 8-gil) or Myeongdong Town (53 Myeongdong-gil). Oral care usually sits with toothpaste. For business or short trips, solid toothpaste tablets (5,056 reviews) are handy: one per brush, and not a liquid, so easy in carry-on. Gels or toothpaste over 100ml go in checked luggage.