(1) Akpa akara nke akụkụ atọ.
(2) transperent elu okpomọkụ iguzogide.
(3) Ọ dị mkpa ka ndị ahịa meghee akpa nkwakọ ngwaahịa ngwa ngwa.
(4) BPA-FREE na FDA kwadoro ihe ọkwa nri.