Feet, would reflect a "bubble" word. "Bubble" reflected here, the water had to be more, the heat should be enough time to be longer. Not just to get a bowl put some water on the line. Did not achieve the health effect, that is up to your feet, not feet. Because the plastic will be issued a plastic taste the high temperatures encountered some harmful substances, make your feet more uncomfortable. We are using the tub feet, you can also try, the effect will be good with.