Note: If you are looking for a slim version fitting inside the boardgame box check this out:

https://www.printables.com/de/model/252157-parks-resource-organizer

In the Boardgame PARKS you have a ressource limit of 12 units. If you do not sort them somehow, you end up having to many which has a huge impact as the ressources are the key element for your game progress. As I tend to be the one hording ressources, I wanted something to help remembering the limit.

I used a backpack model from thingiverse "Intergalactic Boyscout Rucksack" https://www.thingiverse.com/thing:3704257 fitting perfect for the hiking theme of the game, played with its dimensions, added some details and stuff and was done. Just needed to order some brown leather color filament.