STEM Fruit Fly Trap Jar, 5.4 OZ. The best defense against Mother Nature is Mother Nature. Introducing STEM Kills Fruit Fly Trap - a fruit fly killer for home use made with botanical extracts that are safe for you (when used as directed). STEM's scientists decode the power of nature to use botanical extracts to effectively and safely protect your family, home and pets from pests (when used as directed). STEM indoor fly trap attracts fruit flies and kills them. This fly insecticide was tested by entomologists and is safe for use around kids and pets (when used as directed). It has no added dye, added fragrance, or harsh chemical odors. Starts working immediately and lasts up to 21 days. STEM helps protect your family. Our fruit fly trap is Rooted in Nature, Optimized by Science.