Sick Sacks
Chuks Old Man,
Any real helicopter pilot would know that the 30 gallon to 55 gallon black bin liner makes a most satisfactory receptacle in lieu of the half pint paper sack commonly called a sick sack.
Even management level folks can hit the mark with one of those....they do open up to about a three foot diameter hole and have enough depth to hold any amount of bilge water a human could produce in an hour long flight.
They are more common than the half pint sized things and can serve in a multiple of ways in addition to the original desired tasking.
Trim a few arm holes and one has an improvished rain coat much in use in Nigeria....and could in a pinch be used whilst jousting with the odd Night Fighter although they would be a bit small for your average helicopter pilot.
Am now about halfway through the Vietnam trip....ah to be twenty again and know what I do now!
I have been interrogating some betel nut users in your age bracket but none seem to remember you.