You take a 1 inch bottle with a snap lid.
You can use a 35 mm film canister.
But you have to trim the bottom inside of the lid so it
Will fit flush inside.
Then cut a square hole in the lid.
Then take some type of laytex.
Like a laytex glove.
Cut a peace .
then strech it across the bottle so that.
It boarders the hole.
The laytex should cover the hole up.
Where you see the laytex in the hole.
Cut a small hole in the side or bottom to let the air out.
I am not sure how to make the sound.
I can make a sound like a owl with it.
I hope this helps.
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What ever you do be carefull, and
remember to use ear plugs
The Hearing you save will Be Yours
Don't blame me, I voted for McCain!
Good Luck
><)))’>