Silicone Straw Hole Grommets with Plugs for Mason Jar Lids 40 Pack

If you use these with tin plated steel lids, the grommets will collect water and encourage rust. You should remove them each time you wash the lid. Stainless steel lids don't have this problem.

Made of food grade silicone rubber.

For a leak proof experience, be sure your lid is also sealed where it meets the jar.