What is more annoying than bees, wasps and other insects looking for something sweet when you are about to eat a good meal on your porch? Using a PET-bottle, a knife and some adhesive tape, in less than 1 minute you will have the most effective insect trap ever!
Step 1: Cutting
Taking care not to cut your hand into slices, use the knife to cut the bottle. Cut about 1/3 of the top of the bottle, and about as much at the bottom. You will now have 3 pieces. You can discard the "middle" piece.
Step 2: Making the funnel
Now, turn the top part of the bottle upside down, and "insert" it into the bottom part of the bottle. Make sure there are no openings between the funnel and the container, since the insects will crawl out that way. Use the knife to trim the funnel to a perfect fit. You will now have a kind of a "funnel" that will lure insects into the container, but prevent them to find their way out, since insects tend to fly along boundaries and have really bad accuracy for flying through holes.
Step 3: Finish it off
With some adhesive tape, tape the top part of the bottle to the bottom part of the bottle. Pour some soda or other sweet liquid into the container, to about 1 inch deep. Pour some extra sweetener into it, like honey or more sugar. Put this container close (but not too close) to your table, preferably on the floor, and wait for the bugs to start disappearing into the container. Once it's full, just discard it and make another one or empty it and fill it up again:
Time consumed: < 1minute
Money: 0.10 $