keeping ice cream fresh for 12 hours while transporting

Question

Is it possible to keep it fresh during a long distance travel by train? Normal styrofoam boxes won't work I guess, what about thermos flasks?

Answer

My dad used to buy icecream after a long day work for us (it was a 3 hour drive.) He used styrofoam boxes with some dry ice. Not sure if it can hold up till 12 hours.

Check more discussion of this question.