Are the nesting drawers your thinking of the ones that are made below the main box? If so, I have heard of these.
What ever it is you use, you want them to allow for your removal(if you want to bring kits in and for sanitizing between litters), sheltered(from wind, rain, snow, very solid).
I use boxes made from wood. They have a mesh floor to allow for urine to pass through. Wood is not the best for sanitizing, but they were easy for my husband to throw together real quick.