In case anyone wants an easy way to make nice, clear ice fairly easy in a home setting.

https://www.wintersmiths.com/ - These guys make gadgets that you can put in your freezer and get very clear ice. Melt very well/evenly.

You can also find details of their latest machine on kickstarter, which is a work in progress.

edit: I have bought most of their products over the years, starting with their first ice-baller. And supported the phantom kickstarter, and their latest one.