As of now, I'm not a fan. Had to replace the device as the charging port is seemingly too delicate. The device does not come with bubble fluid, nor does Mirko explain what to use or how to use it. I would expect a device like this to ship with an item like that given that it's so highlighted in the marketing. I think it's super misleading. It IS the reason I purchased Rainbow Pro. Otherwise it's just a dumb vape device.

I reached out to the company that distributes Rainbow Pro and they told me to contact Mirko. I emailed him around two weeks ago and have heard nothing.