How to Make a Fruit Fly Trap from an Empty Soda Bottle
Fruit flies can be a nuisance in the home, especially in the kitchen. They seem to appear out of nowhere and multiply rapidly. Luckily, there is an easy and inexpensive way to make a fruit fly trap using an empty soda bottle.
What You’ll Need
To make a fruit fly trap, you’ll need:
- An empty 2-liter plastic soda bottle
- Funnel (optional)
- Apple cider vinegar
- Dish soap
Step 1: Cut the Soda Bottle
Take the empty 2-liter soda bottle and cut off the upper third of it. You can use scissors to carefully cut the bottle. Be sure to cut below the curvature of the bottle shoulders, leaving the funnel-shaped bottom portion.
The funnel shape allows the flies to easily enter the trap. Discard the cut-off top portion – you won’t need it for this project.
Step 2: Make a Funnel (Optional)
To create an even wider opening for the flies, you can make a funnel out of paper and tape it to the opening you cut in the bottle.
Simply cut a funnel shape out of paper. Make sure the narrow end fits into the opening you cut into the bottle. Then tape the paper funnel securely to the bottle’s opening.
This funnel helps guide the flies into the trap. However, it’s an optional step as the altered bottle’s opening alone is sufficient.
Step 3: Add Bait
To bait the trap, you’ll need:
- 2-3 tablespoons of apple cider vinegar
- A few drops of dish soap
Pour the vinegar into the bottle. Then add a small squirt of dish soap and swirl the bottle gently to incorporate it.
The vinegar attracts the fruit flies, while the dish soap breaks the surface tension of the liquid so the flies fall in and drown.
Step 4: Trap and Drown the Flies
With your trap assembled, simply set it out on the counter or other area where you see flies gathering. The scent of the vinegar will lure them in.
The flies are naturally attracted to the smell. When they go to investigate it, they will become trapped in the tub and drown.
Be sure to check the trap daily and replace the liquid as needed. For best results, use this method along with aggressively cleaning up any ripe or rotting produce that the flies may be feeding on.
If flies aren’t entering the trap, try using a stronger vinegar like apple cider vinegar. White vinegar may not produce enough scent.
Check for and eliminate any competing food sources, like ripe fruit or kitchen spills. Remove these and the flies are more likely to go for the trap.
Make sure liquid levels are no more than 2-3 inches deep so flies can easily drown.
With some simple supplies and bait, you can make an effective fruit fly trap in minutes. Use this homemade trap along with good sanitation to control pesky fly outbreaks in your home. The low-cost traps capture flies humanely and eliminate the need for sprays and swatters.