Stupid theory: Meeseeks Boxes are made the same way the Lament Configuration/Puzzle Box was made in Hellraiser, and Meeseeks are just really helpful Cenobites. : r/rickandmorty
Mr. Meeseeks from Rick & Morty | DIY Costume Guide
Amazon.com: Funko Pop! Animation: Rick and Morty - Mr. Meeseeks Vinyl Figure (styles may vary) : Funko Pop! Animation: Toys & Games