1 hour ago, RanaMN said:
Ah - recognize this from the days I needed to get carrageenans for water marbling - don't recall what I was marbling though. Anna would have been able to tell me!
We could try this with a 3D mold - suspect it's just drizzling some cocoa butter onto room temperature water, introducing the mold into the water, plunge and twist and pull out. The trick is going to be having enough surface area for the size of the object and and a deep enough bath that you can submerge it and twist.
Next thought - how to hold it so water doesn't get inside.