In Seomyeon, try Daiso Busan Seomyeon (43 Jungang-daero 702beon-gil), Seomyeon No. 2 (693 Jungang-daero) or the underground mall store, all 10 am to 10 pm. The stick shampoo (8ml × 5) is one wash each for ₩2,000. To decant your own, the 25ml tube bottles (3 pack, ₩1,000, 6K+ orders).