It depends when you will be moving. Unlink trees grown from seed, grafted apples have no tap root. It takes the roots a while to start growing. I've used root pruning containers (RB2) when I plan to keep the trees at home for a season or more before transport and planting because they will benefit from the root pruning and the roots will be undisturbed at planting time. If you are moving in the early to mid part of the growing season, you many not get enough lateral root growth to benefit from root pruning. Any old container would do.