Rust Proof Straw Hole Tumbler Lids for Mason, Ball, Canning Jars (5 Pack, Wide Mouth) 5 Stainless Steel Straw Hole Tumbler Lids for Wide Mouth (3" Internal Diameter) Mason Jars. The straw hole is 10mm. Rust Proof (Almost) - These lids are dishwasher safe and won't rust with normal use. 304 SS will only rust if submerged for an extended time in saltwater. Our family loves the cute painted metal straw lids, but they rust eventually. BPA and Plastic Free - There is no seal, so they will dribble a little if you tip the jar so liquid touches the lid. We do sell reusable silicone seals that fit these lids. 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. Check out our reusable straw options that are the perfect lengths for Mason jars!