The perfect balance of sleek and stable, our signature UltraFlask has a wider form and a durable 3D welded bottom. Soft and pliable material means you can fit it in most pack and larger vest pockets for a snug and secure fit. Topped with our SpeedFill™ Cap for quick refills.

Features

• Soft material conforms to most hydration packs and larger vest pockets for a secure and stable fit.
• Easy to drink bite valve auto-seals after each sip, eliminating annoying drips.
• Designed for fast filling - flips open for quick refills and snaps closed for leakproof transport.
• 42mm opening lets you fill the flask easily with ice and drink mixes.
• Flexible design shrinks as you drink, reducing water movement.
• Pair with 42mm threaded backcountry water ?lters including the HydraPak 42mm Filter Cap.
• Made of ultra-durable, abrasion resistant TPU & RF welded seams for superior durability and elasticity.
• Wide working temperature range (can be frozen - max temp 60° C / 140° F).
• Capacity: 500 ml / 17 fl oz
• Weight: 42 g / 1.4 oz
• Dimensions: 240 mm x 55 mm / 9.4 in x 2.2 in
• Material: TPU, PP, Silicone, POM, 304SS