Platypus Hoser Reservoirs

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The Hoser™ is an ultralight, minimalist hydration system for taste-free hydration in a versatile, durable design for backpacking, through-hiking and day adventures. It comes with a HyFLOO™ bite valve for increased flow rate.


  • Drink on the go: New simple, one-piece, self-sealing HyFLO bite valve makes it quicker and easier than ever to hydrate hands-free with a 30% increased flow rate
  • Easily transportable: Integrated hang/carry loop makes it easy to secure the reservoir in a backpack or elsewhere
  • Pure Platypus experience: All materials are certified taste-free, BPA-free, BPS-free, and phthalate-free
  • Funk-free: Embedded silver-ion protects reservoir from mould and bacteria
  • Versatile: Threaded port and 1/4" diameter drink tube make it easily compatible with accessory caps and adaptors
  • To avoid water sloshing around in your reservoir After filling your reservoir, simply turn it upside down and simultaneously squeeze both the reservoir and the bite valve until all excess air is purged (you can also invert the reservoir and suck out the excess air, if you prefer


Dimensions 15 x 40.5 cm (2 Litres), 18 x 42 cm (3 Litres)
Average Weight 100g (2 Litres)
110g (3 Litres)
Made From BPA, BPS and phtalate-free polyethylene
Bite valve: silicone
Care Hand wash your hydration system using warm or hot soapy water.

For deeper cleaning:

  1. Per litre volume of your hydration system, add ¼ Cup of baking soda to ¾ Cup of water and shake for 30 seconds (e.g., for a 2L hydration system use ½ Cup of baking soda with 1 ½ Cup water)
  2. Add ¼ Cup lemon juice per litre, close and shake 10 seconds, then vent by opening hydration system away from face
  3. Re-seal hydration system and repeat shaking and venting three times. Expel as much air as possible, close hydration system, and soak for 20 minutes
  4. Dump solution and rinse hydration system three times with hot water
  5. Caution: When adding lemon juice to baking soda, effervescence occurs and will cause pressure to build in a closed Platypus product.

To dry, in general, it is optimal to prop or hang hydration system reservoirs upright to dry - this allows moisture to evaporate and escape upward.



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