Another replacement in this little area, spawned from Piggys workshop in the dead of night---just to add an element of mystery-- is the latest iteration of a cache idea that had been used in a similar fashion and returned to the workshop after a biological failure on the part of the Griller, then placed in the production Pipeline for possible retraining and rehousing.
Some cache ideas are well Grounded in Traditional Cache making practices, and rise to the Level of competency utilising the latest in animal husbandry guidelines, if you check the attachments you will see.