Thank you! I did try to save the urine I used yesterday, had put tin foil over the bowl I was using to soak my feet in. When I uncovered it, there was a horrible smell. I think it might be better if it is not air tight, like with a paper towel. Also, it might have pulled some toxins out of my feet. Either way, this is clearly helping me and I love it! Have just bought 6 large mason jars. Best of luck to you..