VEST PACK FIT: Soft material conforms to most hydration vests , belts or pack pockets , makes a great addition or replacement running flask.
COMPRESSIBLE: Flexible design shrinks as you drink , reducing water movement.
SPEEDFILL CAP: Designed for fast filling – flips open for quick refills and snaps closed for a leak-proof seal.
CUSTOMIZABLE CAP: Choose between two cap options. Directly mount your bite valve onto the cap or insert the adjustable drink tube to create a straw cap (can be cut to any length).
HIGH-FLOW: Easy to drink bite valve auto-seals after each sip , eliminating annoying drips.
WIDE OR NARROW FLASK: 500ml flask features an arrow flange for skinny and longer vest pockets. For wider pockets , the 600ml flask features a wide flange for a better fit.
LARGE OPENING: 42mm opening lets you fill the flask easily with ice and drink mixes.