In the past, there was no filtered water, people use rainwater for drinking, and the water had a metallic taste. People used to mix U-thai, which contains Thai flowers and herbs, with drinking water to add a pleasant aroma. This aimed to improve the taste of the water and gain additional benefits from the herbs.

It can be referred to as both “Yaa U-thai” and “Nam Yaa U-thai.” The suffix at the end is a trade name for this herbal medicine, such as “Nam Yaa U-thai MohMee.”

U-thai is made from natural ingredients. Its red color from the sappan wood is natural and generally safe. However, if irritation occurs, it is recommended to discontinue use.