Soaking feet, hence the name, means that all feet must be soaked in water. Since it is a foot bath, it is necessary to embody the word "bubble". "Bubble" here means more water, enough heat and a long time. You can't take a basin and put some water in it. That doesn't work for health. At most, it is foot washing, not foot soaking and pedicure.
General selection requirements
1, the texture should be harmless, safe and have good thermal insulation performance.
2, the height of the foot bath is generally more than 20 cm [not more than the ankle].
3, the structure can buy some foot baths with physical therapy function.