You did a great job with the YouTube presentation. You have a very cool project idea, and I would love to see a transparent ice case. 
When you have the files ready for testing I wouldn’t mind trying to refine the profile to get it to print as clear as it can be. I could technically start attempting to print a hollow 2-3mm thick rectangle with a replaceable back before your files are ready to just play around with it.
Regardless though there will need to be some post processing that needs to happen which technically would further aid in the durability of the product but also make it more transparent.
I’ll subscribe when I get home! Great work.