Tefal Genuine Glass Lid 20cm Brand new, unused. Compact storage. ★ The "Butterfly" folding knob allows the knob to fold down when the lid is stacked, enabling compact storage without the knob getting in the way. ★ Glass lid allows you to see the contents. The glass lid allows you to check the cooking progress without opening the lid. ★ Stable silicone rim. The rim is made of silicone material and adheres closely to the pot body, providing a secure fit.