Trap for Flies No Poison

the flies are annoying and there are millions of them.
there is a solution.

cut the bottom of the small bottle.
make a hole in the middle of the lane of small bottle diameter.
put the small bottle into the hole to the middle.

the best bait is the meat.
flies like more the things that smell bad, for this leave the meat in the sun.

the flies will come and will eat but do not leave because they are stupids