Traveling with film in hot vehicle

[snowbear]

I agree - get a small insulated cooler. Cars get pretty hot pretty fast.

I have small plastic boxes that hold 10 rolls of 35 that I use for traveling. I find them very useful and it would be easier for you to just put the box in the cooler rather than have a bunch of loose film in canisters. Got them at a site called Japan Camera Hunter, which is not cooperating at the moment, but when it does, I can post a link.

Those are pretty cool!

 

[astroNikon]

I use these for my lunches. Might be a perfect solution for you.
Amazon.com: Arctic Zone High Performance ColdLok Expandable Lunch Pack (Black): Kitchen & Dining

the dry ice solution requires some experience in knowing how much, what container to use to prevent direct contact etc. I've used it on/off for a long time so I have no issues with that route even for a small cooling container in my trunk for days. And I wasn't specific in using small chunks not a 10-20lb block. The lunch cooler as above is much more simplistic and easy to deal with.