Try This-
Piccolo Petes- Those LOUD ASS Squeelin Things.
20oz/1 liter/2liter- Basically any plastic bottle.
Take a plastic bag, and push some of it down into the mouth of the bottle.
What we're trying to accomplish is having a little pouch for the powder.
Remove and save 1 fuse from the Piccolo Pete.
Using pliars, and rotating the cylinder from the pete, crush the cardboard until ALL of the white powder comes out.
Make a small, fuse sized hole in the cap- and insert fuse.
Now you've got your basic - RELATIVELY SAFE- Flash/Boom
These are FUCKIN LOUD! Don't piss your neighbors off.
And the bottle, most likely won't be found- so... No evidence