Lezi zikhwama zokugcina ubisi lwebele ezilahlwayo zenziwe nge-PE esezingeni lokudla, engena-BPA, ephephile futhi engenabuthi. Zihlanjululwe nge-ethylene oxide, zilungele ukuthintana ngqo nobisi lwebele. Izikhwama zinezimpawu ezicacile zomthamo nezigaba zokubhala igama, usuku, nesikhathi ukusiza ukuhlela ubisi ngokwesikhathi sokuqoqa. Uphawu olunemigwaqo emibili luvimbela ukuvuza, futhi umklamo wokuma uvumela ukugcina nokufinyelela kalula. Zifanele ukupholisa noma ukuqandisa, ziyisinqumo esihle komama abancelisa.