Corkcicle straw cap turns your canteen into a convenient sipper so you can enjoy drinking on-the-go. It features a leakproof cap attachable with a metal loop.1-Cap designed with a latch to prevent leaks when not in use.2-Comes with two detachable straws.3-Straw can be cut to desired length.4-Compatible with the 740ml or 470ml canteen bottles.