[citation][nom]lashton[/nom]Hydroflouric acid will NOT melt plastic, it melts glass, thats why its stored in plastic containers.[/citation]
Actually, you're incorrect. Fluorine will dissolve most plastics, almost all. That's how Teflon was created. They stored Flourine gas in plastic, and of course it slowly ate through it. The residue at the bottom was Teflon. So, you can store it in Teflon, but it will go through normal plastics pretty readily.
Flourine is the most oxidative element. If it can't eat through something, good luck finding something else that will.
Also, this device is metal, not plastic.