In Seomyeon, go to Daiso Busan Seomyeon (43 Jungang-daero 702beon-gil), Seomyeon 2 (693 Jungang-daero) or the underground shopping center store (777 Gaya-daero B1, J-17), all 10am–10pm. The tea tree soothing gel cream (60ml) is ₩5,000 and fits your 1L carry-on bag. Stock varies by Busan store.