Getting kegs off of floor in keezer

[bcrawfo2]

I'm trying to improve airflow and keep the condensation down in my keezer and think I need to get my kegs up off the floor. I installed a fan when I had just two kegs (have room for 5)...but that doesn't seem to help much once I fully populated my keezer.
I was thinking about putting a small block of 4x4 wood under each keg...but wood and moisture seems like a bad idea.
What do you do?

 

[mendesm]

hockey pucks, come to mind.

 

[Felixio]

Short pieces of PVC pipe of the proper width with holes drilled in the sides.

 

[Yuri_Rage]

What about cutting a few pieces from door mats like these?

http://www.lowes.com/pd_155419-2078...+mat&pl=1&currentURL=?Ntt=door+mat&facetInfo=

 

[bcrawfo2]

I like the PVC pipe. I need some to put my fan on top of ....so I can force the air down.

Thanks everyone.