In Haeundae, go to Busan Haeundae (11 Gunam-ro), 10am–10pm, which carries these; check stock in store. The Lavender vitamin filter (라벤다) is ₩5,000 with 3,619 orders, rated 4.8. The names differ only by scent, so read carefully. Haeundae Station is on Busan Line 2; Gunam-ro runs toward the beach.