Pokemon TCG: Collector Chest 2019 - Rules of Play says:

The Pokémon TCG: Collector Chest contains three foil promo cards featuring Armored Mewtwo, Pikachu, and Charizard. In addition to that thrilling trio, this set also includes five Pokémon TCG booster packs and a mini portfolio that can hold your favorite cards. There's even a selection of goodies that Pokémon fans will love such as sticker sheets, a Pokémon notepad, pencils, and a cool Pokémon coin. Everything comes in a sturdy metal case that can hold all this and more!