Yup!!
I made one for an old child's nebulizer and a 1 gallon oil jug.
Jug for smoke machine, I love me some BrakeKleen!!
Drill hole in top and insert some 5/16" fuel hose to accept the smoke maker
Drill hole in bottom to accept the input from the nebulizer or other air supply. Low pressure medium flow.
Head over to the local corner store and buy a few of the cheapest plastic tipped cigars they have. I got mine at 0.15 cents each. Push unlit cigar into inside of cap hose so that it will smoke when air is applied.
Airline in
light cigar
Insert into jug with air on to keep it going.
Get lots of smoke!
Attach to intake, plug up exhaust and intake system to keep the smoke in. Now look for where the smoke is getting out.