In Haeundae, Daiso Busan Haeundae (11 Gunam-ro) is right by Haeundae Station, 10am–10pm. For ₩2,000, MEDI-PEEL's Aquatox hydrogel mask has 693 reviews at 4.8. We haven't checked stock at each Busan store. One mask for every night of your trip.