The Hydro Flask Straw Lid boasts a high-flow rate to quench thirst, and durability to withstand the most tenacious teeth. It???s top-rack dishwasher safe and has a convenient finger loop so you can clip your bottle when you???re on the go. . ??. . . . . . Patent-pending design. . Durable rubber straw with high flow rate. . Made of durable polypropylene PP#5. . BPA-free. . Compatible with all newer styles of wide mouth bottles. . Lifetime Warranty. .