Straw Hole Tumbler Lids for Regular Mouth Mason, Ball, Canning Jars (10 Pack, American Flag) Includes 10 American flag straw hole tumbler lids for regular mouth (2 3/8" internal diameter) Mason jars. These straw hole lids are made of tin plated steel. They do not have a plastisol liner (the rubber seal on the underside), which means they can dribble if you tip your jar. The straw hole is 10mm. They do not come with silicone grommets in the straw hole, but we will include them for free if you send us a message before your order ships. They are perfect for everyday use or for 4th of July, memorial day, veterans day, birthday parties, baby showers, weddings, and any other social gathering! You can choose to use them with any size Mason jar that has a regular mouth. Half pint jars are great for kids or for cocktails, and pint or quart jars are perfect for water, soda, juice, iced tea, or whatever you feel like sipping on. They pair perfectly with our stainless steel straws, glass straws, or paper straws! Your entire Mason Jar Lifestyle order ships for a flat $3, or free over $35. Check out our straws and other products! Usually ships in 1 day via USPS First Class from Denver, CO.