I order several months of feeders from Big Cheese Rodent Factory in Texas and store them in the freezer. They are vacuum sealed so they will last longer. You are still looking at a decent amount for shipping since they have to insulate the box and fill it with dry ice to keep them frozen, though. And be sure to wear thick gloves when opening the box because some of the dry ice did manage to slip out of the bags in transit. Still, I've ordered from them twice so far and have had no hassles from them either time.