The product was released from the "Ochatomo Series", which features decoration mascots for cups
You can enjoy cute situations of Tanjirou climbing your cup or Nezuko looking into your drink. They come with miniature stands that let you decorate them without cups.
The series features 6 characters: Tanjirou, Nezuko, Zenitsu, Inosuke, Giyuu, and Shinobu.
"Ochatomo Series Demon Slayer: Kimetsu no Yaiba" is a set of 6 figures priced at 5,148 JPY (tax included). Pre-orders are currently available on "Premium Bandai".
(c) Gotouge Koyoharu / Shueisha, Aniplex, ufotable