Zopangidwa ndi kalasi yazakudya, TPR (BPA yaulere), yopanda poizoni, yopanda fungo lamankhwala, imapereka zoseweretsa zotetezeka kwambiri za ana anu.Sizosavuta kuthyoledwa kuti zibweretse ngozi chifukwa ma spikes pa mpira amakhala ndi buffer.Ubwino wowonjezera ndikuthandizira kuti mkamwa ndi mano awo azikhala oyera.