(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.
(1) Ihe oriri ndị echekwara oghere na-abawanye ndụ ngwaahịa.
(2) Windows transperent na-enye ndị ahịa ohere ịhụ ngwaahịa n'ime.
(3) Belata oxidation ọnụego nri, gbochie mgbasa nke nje bacteria.
(4) A na-agbakwunye ọkwa akwa ka ọ dị mfe imeghe.