In ramekins, insert aluminum cups and then paper cups inside those, then pour in the liquid. Place the ramekins in the pot (the water should come 1/3 of the way up the pot, less than half of ramekins. Make sure water does not get into ramekins when it boils). Cover the pot with a kitchen towel and put chopsticks on top and cover with a lid. Steam on high heat for 15 minutes.