If using a tortillas press, pressing out the 20 tortillas should be fairly easy and quick. However,
if not using a tortilla press, grab a gallon sized sandwich bag. Using a scissor, cut off the zip and cut along the folded lines of the two sides by the zipped section so the bag can be easily opened and closed along the one remaining fold line. Open up the flap, place a tortilla dough ball into the center of the cup plastic bag and cover the flap over the ball. Press down with a casserole dish or cutting board.
This post has a quick and easy video to demonstrate this.