Nā hiʻohiʻona huahana
1. Ke hoʻohana nei i ka 100% paʻi kiʻi kumu i lawe ʻia mai i ka mea plastik.
2.Uniform mānoanoa,ʻaʻohe distortion ma ka lalo.
3. ʻO ka circular protrusion ma ka uhi e pili pono ana me ka lalo, hoʻomaʻamaʻa i ka mālama ʻana a me ka hōʻemi ʻana i ka evaporation waena.
4.Surface lapaʻau a untreated elua koho.