1 liter plastic bottle
red wine or juice
- Cut the top of the bottle off (from the point it starts to taper)
- Place top down inside the bottom and tape cut edges together.
- Pour a small amount of wine in the bottom.
- Set out next to bowl of fruit or tomatoes.
- Periodically, place a hand or a piece of paper over the top and tap the bottle ensuring that the flies go downwards to their inevitable deaths.