About this product Compatible with regular mouth mason jars, including jars with an inner diameter of 60mm, outer diameter of 70mm, and height of 130mm. Note: The lid hole is 10mm in diameter and the silicone ring is 8mm in diameter, so straws smaller than 6mm are recommended for best fit. PREMIUM MATERIAL: Constructed from stainless steel, this reusable lid is durable, rust-resistant, leak-proof, dishwasher safe, and unbreakable. PRACTICAL DESIGN: Ideal for toddlers, children, and adults. The straw length is optimized for 8 oz to 16 oz regular mouth mason jars, perfect for thicker beverages while remaining comfortable for small mouths. MULTI-FUNCTIONAL USE: Suitable for drinks such as coffee, tea, and juice. Can also be used as a storage cover. VERSATILE APPLICATIONS: Great for parties, craft projects, DIY candles, soap dispensers, flashlights, and more. Compatible with regular and wide mouth mason jars. Textured grip area provides a secure, non-slip hold.