best disc storage box

I am wondering if anyone knows what sort of box or bin is best for storing discs. My ideal criteria: affordable, each holding approx. 25-30 discs in each container and heat resistant(ie. want to be able to keep them in the back of my station wagon during summer without warping). any thoughts. Last year I just used cardboard boxes that I covered with several towels to keep the sun off them. any thoughts?

[david swamp thing black]

keep em in a cooler

[Norm Cole]

Interesting suggestion! Have you found any particular coolers that really work well, fit the discs right, etc.?

[Norm Cole]

...so, I bought four of the 20 quart sterilite containers from Walmart and a styrofoam swim noodle. I cut the swim noodle into sections that fit in the bottom of the containers and cut them in half length wise, placing each half on the bottom, outer edge of each container. My discs fit perfectly in the boxes and the styrofoam keeps them from touching the bottom of the box. I am thinking this is a good solution.