There is something to having things all organized and contained that settles my soul. Yerba mate has a form of that. It is called a matero. This is a bag you take with you that has the elements of the yerba ritual inside. This one is mine. It has stood up to a lot of beatings. It is a tough bag. I have different memories of taking my matero to places, and feeling like I was at home. I love that it is worn and "patina-d."Use code PINTEREST for 20% off. Yerba Tea. Yerba Mate Benefits.