Keep an eye out for the Tupperware spacers when you are at thrift stores. They are really handy for pies but alos other things you want to utilize space. You can stack pies in a box or picnic basket with those. I like Tartan's idea using an appropriate size box with the styrofoam in the corners. (I keep styrofoam from shipping boxes to use in the basement to keep containers off the floor and having moisture accumulate under them.)