I would like to take this opportunity to quote from the character’s Wikipedia page: “Rilakkuma mysteriously appears in the female office worker Kaoru’s apartment one day. He is a soft toy bear who has apparently decided to take up residence there. On his back is a zipper which when opened reveals a light blue polka dot patterned material. The contents or nature of this zipper is unknown.”
So yeah, he’s a Kit Kat now.