Holika Holika Gel Eyeliner Molten Americano
Taeyeon's own channel pouch reveal; she says every product shown is self-bought; no paid-promotion mark.
Holika Holika
Taeyeon, Kwon Eunbi named or showed 2 Holika Holika items on camera.
Which Holika Holika products do idols use?
Holika Holika My Fave Piece Eyeshadow Two Shot Americano
Applied on camera in Harper's BAZAAR Korea pouch video; the description's product list gives this timestamp. No sponsorship mark.