Mark,
It does not say it's poisonous? So why not give it a shot...:bwahaha:
Probably just poorly worded... Instead of "Cinnamon Flavored", it probably should say "Cinnamon Scented"? Some vehicles with vent intakes in the cowl area will have the smell of the Washer Fluid get pumped into the cabin. I guess the Cinnamon Flavor/Scented washer fluid has a more pleasant smell?
...Rich