Home handyman advice needed

A pack of cereal has dropped down the side of our cupboard inside a 10cm gap between it and the wall that goes about 2.5m down to the floor.
Does anyone have any suggestions on how on earth I get it out without pulling apart the cupboard?
I am thinking of taping something to the end of a pole .... but what? A hook maybe ...
I am stumped here. If anybody has any suggestions I would appreciate it. I'd leave it but the ants will have a field day when they find it. Ants or cockroaches ...

Does anyone have any suggestions on how on earth I get it out without pulling apart the cupboard?
I am thinking of taping something to the end of a pole .... but what? A hook maybe ...
I am stumped here. If anybody has any suggestions I would appreciate it. I'd leave it but the ants will have a field day when they find it. Ants or cockroaches ...