Often the lower lip of Matses tribe women are ornamented with sticks carved from caña brava shoots.  The sticks are put in a piercing below the lip and the size of the stick varies with age; younger woman of the Matses tribe use longer sticks.  Other Amazon tribes commonly put wooden sticks below the lower lip.  However, usually the sticks are much smaller and finer.  In addition, the small sticks are also used by men.