HydraPak  Flux 1.5 L Collapsible Water Bottle + Filter Cap - 50 fl. oz.

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Access potable water anywhere with the fast and versatile 50 fl. oz. HydraPak Flux 1.5 L water bottle with filter cap. It sets a new standard for lightweight backcountry water filtration.


  • Includes a 1.5-liter Flux collapsible water bottle and 42 mm filter cap
  • Flux bottle is lightweight and compact—it's 50% lighter than a hard bottle and compresses down to pocket-size when empty
  • High-flow nozzle can be opened and closed quickly with one hand
  • Flexible handle allows for comfortable carrying, quick attachment and securing the rolled up bottle when empty
  • Bottle is designed to fit in pack pockets when full and to roll up when empty to save space
  • Made of ultra-durable, abrasion-resistant TPU with RF-welded seams for superior durability and elasticity; dual-layer laminate construction adds structure
  • Bottle is 100% BPA and PVC free, and it has a wide working temperature range—container can be frozen or filled with hot water; max temp 60°C/140°F
  • 42 mm filter cap effectively removes common waterborne bacteria, such as E. coli (99.9999%), and parasitic cysts (99.999%) per EPA Guide Standards and NSF P231
  • Removes microplastics (99.999%) per NSF 42 greater than or equal to 3.0 microns in size
  • Filters approximately 1,500 liters of fresh water at a rate of more than 1 liter per minute


View all HydraPak Filter Water Bottles

Technical Specs

Item #219379
Best Use


Filter Type



Filter Medium

Hollow fiber


Protozoa And Bacteria


>1 liter per minute

Housing Material


BPA Free


Field Cleanable



4.5 x 9.8 inches


5 ounces

38 reviews with an average rating of 4.8 out of 5 stars

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