Brown, circular plastic storage container lid. Unknown use. I had it stored at home. Perfect fit for a round container with a diameter of 11.5-12.5cm. Silicone is removable. There is one vent. In my home, it fit a large rice bowl and a ceramic storage container. - Size: Please also check the photos -- Plastic inner diameter: 11.5cm -- Silicone outer diameter: 12.5cm -- Lid outer diameter (excluding handle): 13cm - Brand: Vessel - Color: Brown - Shape: Circular - Material: Plastic Thank you for looking.