Designed to Trap pesky fruit flies.
I created the funnel-lid to fit Bonne Maman jam from Fry's Grocery Store. It's kind of a fancy type of Jam.
Pour in a generous amount of Apple Cider Vinegar which is irresistible to fruit flies. Attach the lid and watch them start landing on the lid. They travel down the funnel and are trapped inside the container with the vinegar