Abstract: The 2.5? long funnel is built for catching and trapping flies, yellow jackets, ants and other flying/crawling insects that are attracted to the smell in the plastic jar. Insects crawl down the funnel into the jar and can't get back out. Insects fly/crawl around inside the jar until they are exhausted and fall into the liquid, causing them to drown. The funnel is made of ridged wire screen and is permanently attached under the screw on cap. There is no need to go and buy one insect trap for files, one for yellow jackets and one for ants; when all you need is “The Funnel 3 in 1 Insect Trap”. Tested for 2 years from models made at my home.