Anything that protects them from drying out and being crushed is perfect. If only an hour or two, even a cardboard box will suffice. If odor is an issue then put them into a plastic bag (like a black contractors bag) before boxing, then seal all edges/openings with tape. Tossing in a fabric scent sheet thingy can also help mask the odor. Using a styro cooler you can just seal those edges, ought to work just fine.
They will be fine I had a pal drive way further with a clone in a solo with water and that's is the little plant stayed alive in my window for over a month