 Oh, you know, a little waterfall and a little pond or bird feeder, you know, a kid's swimming pool or something where you wanted to have water in there, but you didn't want mosquito larvae in there, you would just use these mosquito dunks. And I think they last for about 30 days. I've used them before. I have a couple of containers that I use for catching water all the time. Sure. And I use that for my plants outside. Excellent. They're like plants that are in planters, you know, and they don't get as much water.