Thanks to everyone who posted. I had my first fruit fly infestation - ever. Discovered the source was my teenagers waste basket - she won't sleep in her room till they are gone. Made lots of traps with cups and fruit. They work really well. Only thing is, watch the size of the holes. I watched a few be smart enough to get out again - ugh!
Thought I would add that Glad Press and Seal and a plastic cup work great. It seals automatically along the edges, and you can make it taut. Also, you can reseal the top after you get rid of the pests.
I hope to have my home back in a day or two.