The popular tradition calls them "Ball of Bones" by being accustomed to accommodate in them bones to give flavor to broths and soups, for example. Most modernly, these aluminum structures are used to contain Cooked Portuguese rice, so that it can taste without spreading through the pan. In the same way, they can also accommodate herbs. Or even serve for decorative purposes.

Small: 12 x 12 cm. 
Weight: 85 g.

Medium: 16 x 12 cm. 
Medium: 154 g.

Big:  17,5 x 12 cm.
Weight: 162 g.