Utien Tray sealers ndiabwino pama tray opangidwa kale amtundu uliwonse kapena mawonekedwe. Ndi zosankha zosiyanasiyana zolongedza komanso kuchuluka kwakukulu, timapanga mapaketi owoneka bwino, osadukiza, osawoneka bwino okhala ndi chisindikizo chachikulu komanso nthawi yayitali ya alumali.
Ma tray sealers athu akhala akugwiritsidwa ntchito kwambiri m'mafakitale ambiri, monga zachipatala, chakudya, ndi zida. Timanyamula mitundu yonse ya soseji, nyama, nkhuku, nsomba zam'nyanja, zakudya zokonzedwa bwino, ndi tchizi kuti tiwonetsere bwino kwambiri.