Read about them back in 05 and thought the tech was pretty cool. Glad they finally went into production. I for one am getting some. http://zubbles.com/
From the FAQ "all ingredients are on TSCA". I'm not in the US but when I look and see this means "toxic substances control act [inventory]" then I think: "toxic!!".
Perhaps this is a common claim for US products but I think I'd just say all ingredients are safe and mention a safety certificate they bought^w were awarded.
The whole "Are Zubbles safe" reads like "well not really but they're as safe as other things that are legal".
As the stories are all about how his eyes were stained and he had to evacuate his house, etc., then the marketing needs to have a strong assurance of safety IMO. I don't think they achieve that.
http://en.wikipedia.org/wiki/Zubbles