What a kick-ass idea: a [a href="http://litecylinder.com/"]see-through LP gas tank[/a]. You'll never have to wonder if you have enough gas in the tank again. I may just have to get one of these. Nope, it won't explode if exposed to fire, as their scary test video shows (although it would have been cool if it had exploded).
(http://discoverseattle.net/image/cylinder_side_01.gif)
The composite cylinders are 30% lighter than steel, corrosion free, and stackable. Approved by the DOT special permit #13957.
Flame-resistance test video: [a href="http://litecylinder.com/video.html"]http://litecylinder.com/video.html[/a]