6 Freeze-Lok Bags 5 "Freeze-Lok Bags" Mrs Towler 28 November 2018 We embarked on the mammoth task of defrosting our large chest freezer and used the bags with hope! It took hours for it to defrost and when re-packing approx. four hours later everything was in perfect frozen condition, even ice cream and soft fruit. After forty two years of home freezing, we rated it as our best defrost experience!! It fair lifts the spirits when something so simple works so well doesn't it?