These super thick metal straws are wide enough to suck up tapioca pearls in your favorite bubble tea drink, a thick smoothie or milk shake, or lots of water fast. Our long straws are designed for Quart (32oz) and Pint & Half (24oz) Mason jars, but they also work great for any other tall cups or large glasses. The 12mm outside diameter will not fit any of our straw hole lids. Our 9″ long, 12mm outside diameter stainless steel straws are perfect for drinking thicker beverages like Boba drinks, smoothies, yogurt, or shakes. For juice, iced tea, coffee, soda, etc, most people prefer a thinner straw. But you can certainly drink any liquid through them! The most reliable way to clean reusable straws is our straw cleaner with soap and hot water. They are also dishwasher safe, or a quick rinse might be sufficient. You can also boil these to disinfect them if you want to.