Fruit Fly/Knat Trap

It is that time of year again....fruit flies. I don't know how these things make it into our home. They hang around the sink area. I've put our bananas in the cupboard but they find them, even more disgusting when these nasties come out of there. I have found no super-duper way of getting rid of them. Surely you've seen this idea going around before:

My version is a mason jar, apple cider vinegar, piece of white paper, and masking tape. You have to roll the paper up just right so the hole at the bottom is big enough for them to go through but small enough where they won't find it again to escape. Once they go in, it usually takes a day or so for them to get tired of hanging on the jar and fall in to their, well, sad departure.