[cypher]

Travelling, changing cages & environment can be stressful for hamsters so it is important they each have a decent size cage with enough space for a wheel, house, some toys, somewhere to hoard food etc, if you try to split a small cage it may be hard to do safely & they may get stressed by being in such close proximity.
If you got two identical storage bins that stack well to make bin cages then it would be easy & space saving to stack one bin in the other & pack all their things inside for the journey.