Earlier this Winter, I started to notice that a layer of ice would form over my Dog’s water bowl outside. I would pull it off and toss it in the yard. Then, one day, I held it up to my Dog’s face and took a few photos. I was so excited with the results! I’ve taken a few of people as well. I intend on doing this every Winter from now on. Try it out! Thin-ish ice makes a good filter!