You can get vinyl adhesive-backed sheets to get this look (and many others!). You just cut and stick them.
If you go that route, apply to the glass fully, then use a razor blade to cut around the edges, else you’ll likely end up with skew or edges that don’t meet the corners. (Learned that trick from a vinyl graphics installer)



Yeah, I wasn’t going to suggest that one because it’s easy to mess up and get frustrated with if you don’t know what you are doing.
I’ve tried it with no skill and uhh… heh
But then I helped wrap several race vehicles, the storm windows (with frosted glitter so it looks like frost) and my own shower (underwater world from Mario) and learned how the soapy water thing actually works.
If someone does want to try this, apply a lot of pressure. You need to squeeze all the liquid out, or any pockets will degrade quickly and fail.