From the SnugFit Collection. SnugFit containers offer versatility to prep, bake, transport, serve and reheat. These tempered glass containers are oven, microwave, dishwasher, refrigerator and freezer safe. The multicolour lids are designed to offer a SnugFit seal to the assorted size and shaped containers.. Lids are intended for microwave use only for reheating purposes and storage in the freezer and refrigerator.