Sugiyama brothers, the most famous bubble artists in Japan, publish various videos on youtube. They also uploaded their stage show performances and I was curious to see them.
Some of the techniques they showed were something I had never seen. Among them, the so-called bubble-in-bubble (“Double”) caught my eye. They make a Double with just a single swing of the wand, without blowing into a bubble. It looked magical to me.
https://www.youtube.com/watch?v=w3UcwwOlIlI
Immediately after watching this video, I tried Sugiyama Double several times, but I couldn't. I tried again the next day, but I couldn't. After all, it seems that the wind was the cause of the failure. I was trying this outdoors in the wind. Even a slight breeze often interferes with Sugiyama Double. You can do it well on a windless day or indoors.
A solution with a little more polymer is expected to work for Sugiyama Double, but a general recipe solution is also quite possible.
It's an interesting phenomenon that a folded bubble transforms into a bubble-in-bubble. When demonstrating bubble-in-bubble, having multiple ways to make it will help your show. Try it!