Once they enter the bottle through the mouth, they'll be unable to escape and will eventually drown in the soapy water below.

Homemade fly traps can be surprisingly effective and ... I mix a few drops of essential oil with water in a spray bottle and ...

The Envirosafe Fly Trap has been flying off the shelves across Australia for working as a “highly effective, non-toxic bait” that attracts the bugs to the bottle. One customer ... (in the Bunnings ...