I start with the 16oz beer cup with 3 holes around the edge for drainage...less hassle, less watering, more room for early root development. Once the roots come through the drainage holes and start swirling around the bottom/outer cup, it's time for transplant. Just 1 transplant into their final container, 7 gallon square pots. Less transplants, less possibilty for human error, less stress for all involved.