Fix Magic Pro Lids (9 pieces) at the best price. Fix Magic Pro lids are made of extremely flexible silicone. Fix Magic Pro lids are perfect for any kind of Tupperware container. Since they are made of silicone, Fix Magic Pro lids fit any kind of container. This allows you to preserve your food much longer. Silicone makes the container completely airtight, preventing air from entering and decomposing the food.