I may be the odd one out here.  I do not use pine needles, pine shavings, corn cobs or any other organic material.  As I looked into what to use, my requirements were something that 1) would work; 2) was cheap; 3) was recyclable and reusable; 4) could be cleaned.
The result was for me to use a door mat.  The plastic wire grass door mat is what I settled upon.  Our nest boxes are 5 gallon buckets laying on their side with the cut piece of door mat lining the bucket.  When the mat gets messy, I just pull it out, shake it - hose it off if needed then dry - and place it back in the bucket.  Now I don't have to buy anything for a nesting box. 
My only consumable for the chickens are the food (pellets).