I found Bikkuriman chocolate peanut snack package turned into Hatsune Miku and other vocaloids.
As same as Bikkuriman, it contains a small sticker in the package with a crispy snack.
This package is spring limited edition for Family-Mart convenience chain stores.
I got cutest angel Miku and Kagamine Len stickers.
Hatsune Miku Spring Produts 2015 – Family-Mart
Hatsune Miku – Wikipedia
Bikkuriman – Wikipedia
8tokyo.com 