EASY STRETCH SILICONE: it adapts to fit almost any shape, and the smooth sides stick to surfaces like good quality cling film. EXTRA FRESHNESS: use them to cover containers, cans, cut vegetables, and more - the airtight seal locks in freshness. LFGB GRADE: manufactured to the highest European standards, these stretch lids are robust, BPA free, and microwave and freezer safe. USEFUL INFO: includes 4 silicone food covers in 2 sizes (25cm and 15cm), plus 2 silicone bands; dishwasher safe; 5 year guarantee.