Is this essentially just dop wax? I watched the video you posted with this, and wondered if you had tried tossing the glass in the freezer overnight when you wanted to remove it.

Stacking wax will have a different formulation from dop wax but that's about it. Differing amounts of different types of wax for each product. Yes, you can certainly put it in the freezer to help remove the wax as it will get brittle.