Cling film can be a struggle to use. It can leach harmful chemicals into your food and it ends up in the landfills. These colourful lids create an airtight seal on any smooth rim to keep food fresh when storing. The heat-resistant, food-safe silicone also allows for quick cooking, steaming and reheating in the oven or microwave. BPA-free. Oven safe up to 425°F/230°C. Dishwasher safe.