Whatever happened to fiberglass LP tanks ?

I wondered about these. They had some cool advantages, mainly the ability to check level, and being lightweight. However, I think the entire market for fiberglass composite cylinders was killed by the company that went under, as people thought all composite cylinders were flawed. Even with good ones like Viking, it may be tough to get them filled.

As for what I do, I have three. Two are on the RV with a changeover valve, one is kept filled/exchanged and ready to go. That way, when one goes empty, I just swap the filled one, then next time I hit a Lowe's or other store, I exchange it.