Luggage

Does anyone have any ideas as to how to best pack a batch of mice into a suitcase? I've been looking up the price of travel to their relation's dwelling in Florida, should I hear that a funeral is in the offing. True, the price is very reasonable, ten dollars one way, I believe, plus a possible transfer charge, much cheaper than a night in jail, but still, it makes no sense at all to buy the mice their own seats, and it would be horribly cramped to have to share my seat with them. So, how would be best to pack them in my suitcase? I'm sure they would go along with it. I'll just tell them that the money saved can be used to buy trinkets at their cousin's park.