A wasp trap made from a 2-liter soda bottle uses an inverted top as a funnel and bait liquid to drown the insects.
Wasp traps are simple to make at home. For about five minutes and a plastic bottle you already own, you get a working trap that handles paper wasps, yellow jackets, and hornets. The key is getting the bait and placement right for the time of year.
What You Need to Build the Trap
The list is short. A 2-liter soda bottle (the taller, straight-sided kind works best). A sharp utility knife or box cutter. Dish soap. Staples, clothespins, or twine to secure the funnel. And bait matching the season.
Step-by-Step Instructions
Making the trap takes roughly five minutes for someone who has done it before. The steps below cover a basic version that works consistently.
Cut and Prep the Bottle
Use a utility knife or box cutter to cut the bottle horizontally about one-third of the way down — where the bottle’s curve straightens into a cylinder. Set the top piece aside and remove its cap. Discard the cap.
Invert the Funnel
Turn the top piece upside down and lower it into the bottom piece. The bottle neck points downward into the base, creating a funnel that wasps can enter but struggle to exit.
Secure the Pieces
Fasten the funnel to the bottom. Staples work well and hold permanently. Clothespins let you remove the top later to empty the trap or switch bait. Twine or wire also works if you do not have staples.
Add the Bait and Soap
Pour about one inch of bait solution into the bottom. The bait differs by season (details below). Add exactly one to two drops of dish soap per cup of liquid. The soap breaks the water’s surface tension so wasps can’t float or push off the surface — they drown.
Fit a Smaller Opening (Optional)
If the bottle neck opening allows larger bees to escape, fold a piece of packing tape, poke a three-quarter-inch hole in the center, and stick it over the funnel opening. This creates an opening that is wasp-sized but too small for honeybees to enter easily.
Add a Hanger
Punch two small holes in opposite sides of the bottle where the two pieces meet. Thread string, twine, or wire through the holes and tie the ends together. The trap hangs from this loop.
Seasonal Bait Guide
Using the wrong bait for the time of year explains most trap failures. Wasps switch their diet as the colony grows, and the trap must match their current craving. The table below breaks down what to use and when.
| Season | Bait Type | Example Baits |
|---|---|---|
| Late winter / Early spring | Protein (rebuilding colony needs larvae food) | Cooked meat scraps, fish, liverwurst, partially cooked hamburger, bacon grease on a cotton ball |
| Mid to late summer / Early fall | Sweet (adult wasps crave sugar for energy) | Jam or jelly dissolved in water (1 cup per quart), fruit scraps, crushed grapes, apple cider, or half a cup of soda mixed with two cups of water |
| Any season (add to sweet bait) | Vinegar (deters honeybees) | One cup of white or apple cider vinegar added to the sweet mixture |
| Any season (always) | Dish soap (drowning agent) | One to two drops per cup of liquid in the trap |
Where to Hang It
Place the trap at least 20 feet from decks, patios, and any areas where people eat, drink, or gather. A trap positioned too close attracts wasps toward human activity rather than away from it. Hang it about four feet off the ground. On hot days (85°F or above), put the trap in shade to keep the bait from evaporating. On cooler days, place it in sunlight to warm the bait and release more scent.
If you prefer a ready-to-hang alternative or want a second trap design with a fully sealed chamber, the best baited wasp trap picks cover tested commercial options that last a full season.
How to Keep Honeybees Out
Honeybees are beneficial and should not end up in a wasp trap. A sugar-only bait will attract them. Add one cup of vinegar (white or apple cider) to the sweet mixture — wasps tolerate it, but honeybees avoid it. Another method is placing a small piece of mesh over the funnel opening so only wasps small enough to squeeze through can enter.
Common Mistakes That Ruin the Trap
- No dish soap. Without soap, the surface tension lets wasps land on the water and fly back out. One or two drops makes the trap actually work.
- Hanging it near the picnic table. The trap lures wasps toward the area, not away from it. Keep 20 feet of distance.
- Using sweet bait in spring. Early in the season, wasps hunt protein for the colony. Meat or fish works; jam does not.
- Using protein bait in late summer. By August, wasps want sugar. Old fruit or soda draws them; raw meat sits ignored.
- Using pet food. Canned pet food spoils fast and wasps lose interest. Stick with fresh meat scraps or fish.
Emptying and Cleaning the Trap
Check the trap every two to three days. When it fills with dead wasps, empty the liquid into a sealed bag or an outdoor garbage can. Rinse the bottle with water, refill with fresh bait and a drop of soap, and rehang it. If the bottle starts to smell rancid (especially after protein bait), wash it with a vinegar-and-water rinse before refilling.
Seasonal Timing: When to Start Trapping
Set traps out in late winter or early spring when the first scout wasps appear — usually as daytime temperatures stay above 50°F. Protein bait in early spring catches queens before they build nests. Swap to sweet bait in midsummer as the colony shifts to sugar foraging. Traps remain effective through early fall; stop once frost kills the colony.
Check Off: Trap Ready
Before hanging the trap, run through this short list to confirm everything is set: funnel inverted and secured, bait matches the current season, one to two drops of dish soap added, honeybee deterrent included if using sweet bait, trap hangs at least 20 feet from activity areas, and the hanger is strong enough to hold the bottle when it fills with liquid and dead insects.
FAQs
Will a homemade wasp trap catch yellow jackets?
Yes, the same design works for yellow jackets, paper wasps, and bald-faced hornets. Yellow jackets respond especially well to meat-based bait in early spring and sweet bait in late summer. The funnel size is the same for all three.
Can I use a milk jug instead of a soda bottle?
Yes, a 1.5- or 2-liter plastic milk jug or chocolate milk carton works the same way. Cut the top third off, invert it into the base, and secure it. The wider opening may require the tape-mod trick to match wasp size.
Does the trap attract more wasps than it kills?
A trap placed within 20 feet of where people sit can attract wasps to the area. Hanging it at the edge of the yard pulls them away from the house. The bait scent travels maybe 30–50 feet, so location determines whether the trap solves the problem or moves it closer.
How often should I change the bait?
Swap the bait every four to seven days. Warm weather speeds evaporation and spoils protein bait faster. The liquid should still cover the bottom inch; refill it if it has dropped. Old bait stops emitting scent and the trap goes quiet.
What should I do with the dead wasps when I empty the trap?
Pour the liquid into a sealed trash bag or directly into an outdoor trash can. Rinse the bottle before refilling. Do not compost dead wasps — the liquid mixture is not suitable for compost, and handling the bottle near compost bins can attract new wasps.
References & Sources
- Apartment Therapy. “The 2-Liter Soda Bottle Wasp Trap.” Cut-and-invert bottle trap instructions with photos.
- Garden Therapy. “Super Simple DIY Wasp Trap.” Seasonal bait guide and common mistakes.
- Instructables. “Reuse an Old Plastic Jug — How to Make a Hornet Trap.” Detailed DIY construction with honeybee deterrent notes.
- Atwater.org (PDF). “How to Make a Homemade Paper Wasp Trap.” Temperature and placement guidance for California wasp species.