These extra large silicone straws are a great plastic straw alternative great for water bottles (works well with most 20oz and 30oz tumblers). Silicone is a great material for straws because it's soft and comfortable while being eco-friendly. It won't chip your teeth unlike other plastic straw alternatives. The straws themselves are dishwasher safe, FDA inspected, and safe for all ages. Also included is a free "straw squeegee" for additional cleaning. Their eco-friendly packaging makes them a great all around purchase you can make without producing excess trash and waste.