inov-8 UltraFlask 0.5 With 10 Tube

The versatile 500ml Ultraflask features a high flow phaser bite valve and a 10" tube so it can be used with standard tops or straws depending on your preference. A large 42mm cap entry aids quick and easy refilling at race checkpoints. A durable, shaped RF welded construction and flexible TPU design ensures the bottle is soft and flexible, reducing any water movement and fitting to any body shape.