You can just imagine people’s bewilderment at the odd wording. Are we supposed to sip from the urinal if thirsty? However, some kind translator probably only wanted to point flyers toward H20. And after all, don’t we all feel replenished after guzzling down a few glasses of toilet water?
Maybe frequent flyers are so used to the roar of turbines they started using engine fire as personal fans on hot days. Nothing like a faceful of 500 mph winds to put a breeze in your hair! But in all seriousness, it’s probably wise to remind folks that propeller planes aren’t toys.