The Spill Stop is made from 100% food-safe silicone:

• Seals
• Speeds up cooking, saving energy
• Suitable for pots, ovens, microwaves, and pans
• Ideal for steaming

Its secret lies in the special removable flower-shaped attachment, which regulates boiling and prevents overflow. Once the steam surrounds the lid, the flower "opens." The temperature drops, steam...