Best Hydriam 500ml Collapsible Flask – 42mm Water Bottles

Jump to: Our Verdict / Features / Specifications

Cnoc’s latest product, the Roll-Up Collapsible Flasks, is a fantastic option for runners and hikers who use vest harnesses to carry water. The flasks are available in three sizes (350ml, 500ml, and 750ml) and feature a tapered design that helps them easily slide into shoulder pockets. 

CNOC Outdoors says: 

The Hydriam is a soft, collapsible, reusable drinking flask.

Perfect for storing water in running vests or for a simple way to carry a flask of whiskey up the mountain, the Hydriam is a versatile and lightweight way to carry whatever liquid you need it to. The Hydriam comes in three different volume sizes, allowing you to fully customize your set up to your needs. All three sizes feature a tapered design that allows them to easily slide into the pocket of a running vest. The back includes markings for measuring out liquids while cooking or mixing your favorite camp cocktail.

Using the same universal 42mm thread as the Vecto, the Hydriam is compatible with filters like the Katadyn BeFree, allowing for filtering on the go during long runs or fastpacking trips.

Our Verdict

In recent years, Cnoc has surged to prominence in the camping community, establishing itself as a front runner in hydration solutions. Consequently, any new product released from them naturally garners significant interest. The latest addition to their lineup, the Roll-Up Collapsible Flasks, is a stellar option for runners and hikers who rely on vest harnesses to carry their water on shoulder straps. Thanks to their tapered design, these flasks seamlessly integrate into vest packs and collapse to a compact size, effortlessly fitting into side pockets when not in use. 

Available in three sizes—350ml, 500ml, and 750ml—the Hydriam Collapsible Flasks offer flexibility to meet different hydration needs. The secure 42mm tethered cap is compatible with popular water filters such as the Katadyn BeFree Water Filtrer and the Hydrapak 42mm Filter Cap.

Furthermore, these flasks are FDA-approved and devoid of harmful substances like BPA, BPS, and BPF, underscoring Cnoc’s commitment to your health and safety during all your adventures.

If you’re familiar with Cnoc products, you know they’re exceptionally durable. The Hydriam Collapsible Flasks are made with the same materials as their flagship product, the Vecto, ensuring longevity.

– Reviewed by Ultralight Outdoor Gear

Features

• Rolls up small when empty
• Our lightest water carrying container
• Tapered design to easily fit in running vest pockets
• 350ml, 500ml, and 750ml volume size options
• Tethered cap
• Attaches to filters with a 42 mm thread, such as the BeFree
• Robust and durable, utilizing the same material as the Vecto
• FDA approved and BPA, BPS, and BPF free

Specifications

• Weight: 30g
• Capacity: 500 ml / 17 oz
• Packed size: 4 x 2.5 x 1.5 in / 10 x 6 x 4 cm
• Trail size: 8.5 x 4 in / 22 x 10 cm

Material & Construction

• Made from FDA approved TPU
• BPA, BPF and BPS free
• Operational temperatures: 20°F (-6°C) to 120°F (49°C)
• Please note: TPU is a porous material and so is not completely smell free after production, please clean and air prior to use.

Help & advice:

• What does BPA Free Mean?