according to the internets, you don't need anything... just a bucket with 2/3rd's of top soil, not even potting soil... then the other 1/3 of water... top it off, every day, or change the water out every week, and that's it... crazy... i'll see what i can use as containers...
the one that i sent you, it comes with the container already... but where did you get them from...? how much did you pay for your lotus...?