Features:
-Hydration vest compatible - fits easily in most hydration vest, belt or pack pockets. Provides bounce-free stability and a flexible flask shoulder to prevent chafing.
-Collapsible flask- soft material conforms to any pocket, and shrinks as you drink to reduce movement and pack away easily when empty.
-Ultralight hydration - makes A great hydration addition or replacement for distance or trail running.
-Durable - Made of abrasive-resistant TPU, high-flow bite valve easy-seals after each sip, eliminating annoying drips.
-100% BPA & PVC free - no weird taste, and no unnecessary or harmful chemicals.

Specifications
Brand: Aonijie
Model Number: SD21-R500
Material: TPU
Temperature: 0-40℃
Net Weight: 48G
Volume: 500ML