(1) Lub pob muaj lub zipper kaw, uas tuaj yeem rov qab siv tau thiab tuaj yeem kaw cov khoom.
(2) Dawb ntawm BPA thiab FDA pom zoo cov khoom noj khoom haus qib.
(3) Nws thaiv cov teeb ci ultraviolet, oxygen thiab noo noo los ntawm lub ntiaj teb sab nraud, ua kom nws tshiab ntev li ntev tau.