Stainless Steel Straw Hole Tumbler Lids for Mason, Ball, Canning Jars (10 Pack, Wide Mouth) Includes 10 stainless steel straw hole tumbler lids for wide mouth (3" internal diameter) Mason jars. These lids are dishwasher safe and won't rust with normal use! Our family loves all the cute painted metal straw lids, but all the others are made of tin-plated steel, which is prone to rust. These straw hole lids are made of 18/8 304 grade stainless steel with no liner. The straw hole is 10mm. Without a seal, they will dribble a little if you tip the jar so liquid touches the lid. I don't bother with a seal myself, but I do use them for my kids. Most other straw hole lids have a built in plastisol seal  we wanted these lids to be plastic free so they don't. The silicone seals for our stainless steel storage lids will also fit these lids - they are sold separately. They are perfect for everyday use or for birthday parties, baby showers, weddings, and any other social gathering! You can choose to use them with any size Mason jar that has a wide mouth. 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.