Quick, Easy, Disposable Funnel.
You can make a funnel out of Aluminum foil by simply taking a peice, folding it in half (or more--see below) and wrapping it in a conical shape....
Depending on the viscosity of the liquid you are pouring--- You can modify the thickness of the walls of the funnel by increasing or decreasing the amount of folds--- just make sure the top of the funnel has no folds exposed so that liquid will not accidentally gather.
If your pouring into a small hole use your finger as a guage when making the cone shapped.
You can modify the length of the funnel by starting with longer sheets of foil.
When your all done, no need to store a dirty funnel just ball it up and throw it out (or better recycle)
Small disclainer-- make sure what ever substance your pouring will not have any adverse to or from the alluminum foil.