If you are hauling these targets to and from wherever you're shooting, weight might be a consideration. Here's a thought. Traffic cones. The rubbery kind, not the plastic ones for sports. They can take a beating, stack up for storage, and small ones will move when you hit them. You can also use them as a stand for the previously mentioned clay holders. At home I sometimes put tin cans on those holders.... two on each, and pick them off with the rifle.
There are also a number of different shaped ground bouncer type targets available. They're fun, and highly reusable. Every time you hit one it gets farther away.