The Tradition of Loi Krathong Sai is the intelligence herilage of local Tak people for gradurations. It originaled from the ancestor’s creativity combined with local wisdom before becoming the valuable tradition. The uniqueness of Krathong Sai at Muang Tak is the production of krathongs made of the coconut shells, recycled from Thai cooking ingrediets, especially in "Sai Mieng" the famous local snack. After coconut contents are removed, a lot of coconut shells are leftover. With the local wisdom of Tak ancestors, the shells are recycled creatively to become beautiful Krathongs used in the floathing contests Hmong Tak communities until now in Loy Krathong Sai Festival called a Thoudsand of Floating Lantens.