[souffle]

The cage will be fine for a bit as he is on;y tiny just now. It is quite open so he may be scared to depouch in case someone steals his stash! If possible maybe you could shelter half the cage with a big box or something so he could feel a bit less exposed.
The bedding should be all right as it looks fine. Does he chew the bottle spout at all?
Lets see if he unloads the food in a day and if not maybe an idea to have this checked out.