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 standard-size Mason jars, regular mouth, 2 3⁄8 in (60 mm) inner and 2 3⁄4 in (70 mm) outer diameter. Straw hole is 0.56" and will fit our collapsible straws and even 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: Kraft paper tag with UPC. Glass Jars not included.