Fair Trade Zambia Munyumbwe Basket: This style is similar in materials to the Tonga plateau style, but they have a second coil of vines on the back of the basket. This makes the basket double thick, almost like one basket woven on top of another. They are very stiff and strong bowl shapes with patterns that are distinctly different from other styles of Tonga baskets. They are woven in deep or shallow bowls.