you shouldnt repot until they are a little bigger, they may not be able to handle the stress. one nice thing about the clear pots is that you can see how fast the roots will will outgrow the pot. i used clear pots, at first (mountain dew bottles), and watched the roots grow quickly, but didnt transplant until they were about 6 or7 inches tall. when i did finally transplant to a dark pot the roots, dirt, and all came out of the old pot in one piece and in to the new pot with no mess or shock to the plant.
just be patient, wrapping the cups should be fine til they grow a little more, and you can pull the wrap off from time to time to see how fast your roots are growing(they grow fast).
they look good