WILDREEDS Collapsible Soft Flask, Green, 500 ml, 2-Pack TPU Bottles with 20 mm Cap and High-Flow Bite Valve

WILDREEDS 500ml Soft Flask is a lightweight, BPA-free TPU collapsible water bottle sold as a two-pack, designed for fast hydration on runs, in hydration packs, and during outdoor adventures.

These soft flasks use food-grade thermoplastic polyurethane (TPU) so they stay flexible, durable and easy to clean. Each 500ml bottle fits most running vests and hydration sleeves, folds flat when empty to save space, and includes a wide 20mm cap with a high-flow bite valve for quick sips without stopping your activity. The set’s recommended operating temperature keeps fluids safe and comfortable to drink during typical outdoor use.

How does this soft flask fit into my running vest or hydration pack?

The 500ml size and pliable TPU construction let the WILDREEDS flasks conform to pockets and sleeves, reducing bounce and bulk. Because they collapse as you drink, they avoid sloshing and keep the weight centered close to your body.

• 500ml capacity per flask — compatible with most running vests and pack sleeves
• Flexible TPU molds to pocket shape for minimal movement
• Collapses flat for easy storage when empty
• Wide 20mm opening for filling and cleaning

What makes the valve and cap easy to use on the move?

The bottle features a 20mm screw cap and a high-flow bite valve designed for one-handed drinking while you run or cycle. You don’t need to remove the flask from your pack — simply nibble the valve to open flow and release to seal.

• High-flow bite valve for instant hydration without removing gear
• 20mm wide cap for spill-free refills and straightforward cleaning
• Self-sealing valve reduces leaks during activity
• Low-profile design keeps mouthpiece accessible but protected

How durable and safe are these bottles for outdoor use?

Constructed from food-grade TPU, the WILDREEDS soft flasks are BPA-free and designed to withstand repeated folding and packing. They are recommended for temperatures from 0–60°C and cleanable after each use to maintain hygiene.

• Food-grade TPU material — BPA-free and flexible
• Built to resist punctures and repeated collapsing
• Temperature range suited to normal outdoor conditions (0–60°C)
• Wide mouth simplifies hand washing and drying

How should I use and care for these collapsible water bottles?

Rinse and wash the flasks after use; allow to dry fully before folding to prevent odors. Fill with cool or room-temperature liquids within the recommended temperature range and avoid long-term storage of sweetened drinks to reduce residue buildup.

• Hand wash the bottle and valve; air-dry fully open
• Store folded only when completely dry to prevent mildew
• Use within 0–60°C; avoid boiling or freezing
• Replace valve if it shows wear to maintain leak resistance

Who is this for: The WILDREEDS 500ml Soft Flask two-pack is suited for runners, trail and ultrarunners, cyclists, hikers, climbers and anyone who needs a lightweight, packable hydration option. It’s a practical pick for people who want minimal bulk, quick access to water while moving, and an easy-to-clean bottle that tucks away when finished.

Package details: two 500ml soft flasks made of food-grade TPU, a 20mm wide cap per bottle, and high-flow bite valves that let you hydrate faster without interrupting your activity.