This set includes (1) 9.5mm x 8" glass straws and a handmade glass straw sleeves. The sleeve is made of Organic Cotton fabric and Natural Cotton Batting. They are double padded for extra protection. Glass Straw is a great way to sip your beverage and help the reduce the pollution of plastic straws. Each Glass Straw comes with a reusable cleaning brush but they are also dishwasher safe. We use high quality borosilicate which makes them extremely durable.