




Flask with filter -
The Flex Peak Serie 650ml is a filtering flask from the brand LifeStraw.
The flask and the microfilter, weighing only 102 g and filtering up to 2000 L, are separable: this allows you to use the filter as a filtering straw or as a filtration system compatible with various containers such as a water bottle or a Hydrapak hydration reservoir.
Moreover, the filtration occurs in two stages and can filter 99.999% of bacteria, parasites, microplastics, silt particles, sand, and other impurities. Ideal to take on your multi-day hikes, this flask is very efficient and durable. Finally, it takes up no space once empty as it compresses perfectly.
Thus, this filtering flask model is a must-have for all hikers who love exploring mountains, valleys, and other natural environments.
WARNING: do not put the filter in the freezer. Furthermore, this product requires no electricity, battery, or spare parts. The energy is generated by the suction created by the user.


- Complies with US EPA and NSF P231 drinking water standards for the removal of bacteria and parasites
- Complies with United States Food and Drug Administration (FDA) standards
- Chemical-free, BPA-free
Filter actions:
- Removes 99.999% of bacteria, parasites, microplastics, silt particles, sand, and other impurities
- Reduces turbidity (cloudy appearance of water)
Filter lifespan: 2,000 litres
Filter pore size: 0.2 microns
Flask dimensions: 25.4 x 10.4 cm
Flow rate: 1.2 L/min
In the kit:
- Foldable soft flask Peak Series 650ml with screw cap and attachment
- Backflush cleaning accessory
- User manual