So light you might forget you brought it, the HydraPak UltraFlask 500 fits snugly in most hydration vest pockets and shrinks as you drink to minimize sloshing.
- Soft material conforms to any pocket, in a size that's ideal for hydration vests, belts or pack pockets
- Large 42mm opening lets you fill the UltraFlask easily with ice and drink mixes
- Cap with adjustable drink tube and removable bite valve allows easy sipping
- Bite valve can be mounted directly to cap, so you can use the flask with or without the drink tube
- Can be frozen or filled with hot water (max temp 140°F)
- Soft plastic is 100% free of BPA and PVC