Where to find customise soap making shop in HONG KONG

I've seen on TV about a shop that's customize soap which can have different designs and shapes. But i do not know the exact location. Is there anyone out there who knows? Can kindly tell me. THANKS ALOT.

I saw one time in Causeway

I saw one time in Causeway Bay, It was a just a small stall (do not remember exact location.)
will let you know if see anything.