XIANQI Safely seal your cups to prevent them from spilling and to keep dust away. Simply press the lid slightly until suctioned. Material: non-toxic food grade silicone. Does not emit odors. Knobs and lids come apart, but it is easy to assemble. Silicone lids is also very easy to clean after use. Can be used on cups, mugs, wine glasses, and small bowls. Seals tight on all smooth, prevent from dust, airtight and leak proof, keep your coffee or tea hot. Product includes: 1pc Colour: Random colours Size: 11.5*10*3.5 cm Notes: Please allow 1-3cm error, due to manual measurement, please make sure you don't mind before bidding. Due to the difference between different monitors, the picture may not reflect the actual colour of the item. Thank you for your support!