From November 1st, 2020 until December 9th, 2020, the first
Pokémon Winter Tower (ポケモン ウィンタータワー), where you can party with the most popular Pokémon this winter season, will be available at Baskin Robbins in Japan. You can choose eight of your favorite regular-sized ice cream cups and they can be displayed on a cute tower with Pokémon having fun playing in the snow.
The ice cream cups also have a cute design with Pokémon on them. It's fun to choose your favorite Pokémon from among 9 Pokémon in total and display them on the tower. A Pokémon the Movie: Coco sticker sheet is also included so you can have lots of fun! The tower and ice cream cups come packaged in a special Pokémon Winter box.
Sources:
https://www.31ice.co.jp/contents/product/cake/20xm07.html and
https://www.pokemon.co.jp/goods/2020/11/201106_fo01.html