Unische's Pocket

a threshold to another dimension rises from the arcane circle, the door expands to fit large creatures.

The interior is to the spell casters will and can be manipulated as such. The pocket dimension is near infinite space without room limit. Any items created in the dimension has to stay within the Pocket and will disappear if removed. Any food created by the spell functions as regular digestible food. 

The space created by the spell remains once originally created so items that are placed in the Pocket will remain in the pocket when the spell is ended and can be retrieved when the spell is recast.