Step 1: Step 1: Find a plastic cup
Find a plastic cup of any kind. Even one of them paper/wax lined cups would work too. Whatever kind of easy to cut cup you have on hand and mind destroying will do.
Step 2: Step 2: Cut a slit down one side
Step 4: Step 4: Roll into a funnel shape and tape.
And you're done! Of course, you could always just remember to buy a funnel too. :)
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