Convert standard and wide mouth Mason jars into drinking cups easily with these sustainable bamboo mason jar lids with straw holes. Made with sustainable bamboo with a removable silicone seal- these lids come in two sizes: standard and wide mouth. Turn old pasta jars, canning jars, etc into to-go drinking cups or boba cups for a simple, sustainable zero-waste swap! Great for kids too! Size: Fits wide mouth, 3 in (76 mm) inner and 3 3⁄8 in (86 mm) outer diameter, versions. The straw hole is 0.56" and will fit our collapsible straws and even our boba straws! Mother Earth Approved: Made from high quality and smooth, naturally antimicrobial bamboo, this is a great addition or gift for those trying to live more sustainably. Packaging: Unpackaged. Kraft paper tag with UPC. Glass jars not included.