UltrAspire SoftFlask Straw w/ 42mm Cap

The UltrAspire SoftFlask Straw w/ 42mm Cap is a straw attachment for soft flasks that lets you swap between a high-flow bite cap and a straw. Built in collaboration with HydraPak, it is a small part that changes how you drink on the move.

It suits vest runners who would rather sip through a straw than pull a flask out of a pocket. Unscrew the standard cap, fit this one and you have picked your flask setup for the day. It fits all soft flasks with a 42mm opening, so it works across a wide range of bottles, and swapping back is just as quick.

It pairs with our UltrAspire 800 mL Softflask w/ Locking Cap, a big HydraPak-made flask that takes a cap of this size. Run with it in a vest for long days, then switch back to the bite cap whenever you want.