Dimensions and fit - Material: bamboo lid with straw hole - Outer diameter 70 mm, inner diameter 54 mm - Fits glass cups with a bottle mouth inner diameter about 60 mm (2.36 inches) - Straw hole diameter 15 mm (0.59 inch), wide enough for standard straws Compatibility and sealing - Fits mason jar regular mouth cups - Includes 2 silicone sealing rings - Mouth sealing ring is double-layer for added leakage protection Suitable for most drinking jars - 2.75 inch / 70 mm diameter lid designed for broad compatibility - Works with common 16 oz, 20 oz, and 24 oz glass cups on the market - The straw hole sealing ring helps protect your glass straws Material and performance - Made from natural bamboo material - Biodegradable and environmentally friendly - Durable and resistant to deformation or breakage - Suitable for beverages such as tea, latte, coffee, cola and soda water Use scenarios - Home use: cover and seal your glass cup to reduce spills during daily activities - Office or cafe setting: keep drinks secure on desks or tables, while using a straw - On the go: convenient for travel or outdoor use to prevent splashes and keep beverages covered This product maintains a professional, straightforward design while delivering practical benefits: secure sealing, broad compatibility, durable bamboo construction, and versatile use with popular cup sizes and beverages.