*INFUSER ONLY* Patent-pending design snaps onto your straw and is compatible with Hydro Flask-brand straw lids, including the original straw lid and the Flex Straw lid. The straw is approximately 0.25 inches in diameter. Larger straw diameters and other bottle brands may not be compatible with FlavorFuze Straw. Easy to install and remove from your bottle. Just add your fruit, snap your FlavorFuze Straw onto your straw, and attach your lid. The infuser will stay out of the way and continue infusing your water, while still allowing you to sip from your bottle. Made with food-grade plastic and is BPA-free, so it's safe to use. The tube is 6.5 inches tall and is larger than other after-market infusers so you can fit plenty of fruit for extra flavoring.