In Haeundae, Daiso Busan Haeundae (11 Gunam-ro) sits on Gunam-ro, the street from Haeundae Station to the beach, open 10am–10pm. The Little Kakao Friends 500ml bottle in blue is ₩2,000, easy for the beach or the KTX. We didn't check stock at each Busan store, so try another if it's sold out. Buy before heading to the sand.