Probably Northwest Coast
This cedar root and string woven bag is typical of bags that were traded at the great gathering sites such as Celilo Falls on the Columbia River. It was used to store or transport roots, berries or other foodstuffs. The loose weave suggests it could also have been used to wash newly gathered foods.
Cedar root (Thuja plicata), cotton. L 46.0, W 17.0 cm
Nez Perce National Historical Park, NEPE 2333