Well, they are of limited range of course. A far more evil use of this particular weapon is to simply create a front line, anchored to the ground (for stability) and a couple of large fans to blow in the direction of the oncoming forces.
Unignited, the compound produced is a nasty airbourne toxin with a similar spectrum of side effects as the compounds commonly found in the 'wet' camine / COW-PAT devices.
Consequently, these 'drinks', whilst having their 'conventional' uses are clearly precursors to WMD.