Say goodbye to disposable straws forever. We believe in sustainability and products that last. If you need a straw, try our SAN plastic, reusable straws. They are top-rack dishwasher safe. We have two sizes--one for our 18oz tumblers and one for 24oz tumblers. If you need a replacement lid, our universal lid fits both sizes of tumblers. This lid is really amazing. It works equally well for sipping or for straws, and you can control the flow of the beverage by either keeping the middle hole open or closed. Keep the middle hole open when you put the lid on the tumbler to release the air. Don't get to clean your lids, including the o-ring (which is removable). Their top-rack dishwasher safe.