Platypus Hoser Reservoir


SKU: PLTOSRS Category: Tag:

Ultralight taste-free, minimalist reservoir with high flow rate.


The original Platypus® water reservoir that became a backcountry classic, the Hoser™ is an ultralight, minimalist hydration system that delivers taste-free hydration with a versatile, durable design that makes it great for backpacking, thru-hiking, and day hikes.

Updates include a new self-sealing HyFLO™ bite valve that delivers a 30% increase in flow rate, making it quicker and easier to hydrate on the go.


Drink on the Go: Experience effortless hydration with our new HyFLO bite valve. Enjoy a 30% faster flow rate for quick, hands-free water access.

Easy to Carry: With an integrated hang/carry loop, securing the reservoir in your backpack or elsewhere is a breeze.

Pure Platy Experience: Drink worry-free. Our materials are certified taste-free and free from BPA, BPS, and phthalates.

Funk-Free: Stay clean and clear. Embedded silver-ion technology prevents mold and bacteria growth.

Versatile Use: Featuring a threaded port and a 1/4″ diameter drink tube for seamless compatibility with various caps and adaptors.

Materials: Polyurethane/Polyethylene film, Polyethylene spout, Silicone bite valve


1 Liter Model

  • Capacity: 34 fl. oz (1.0 liter)
  • Weight: 3.2 oz (0.09 kg)
  • Dimensions: Width 5.2 inches (13.5 cm), Length 11.5 inches (29 cm)

1.8 Liter Model

  • Capacity: 60 fl. oz (1.8 liters)
  • Weight: 3.4 oz (0.10 kg)
  • Dimensions: Width 6.7 inches (17.0 cm), Length 11.5 inches (29 cm)

2 Liter Model

  • Capacity: 70 fl. oz (2.0 liters)
  • Weight: 3.6 oz (0.10 kg)
  • Dimensions: Width 6.0 inches (15.0 cm), Length 16 inches (40.5 cm)

3 Liter Model

  • Capacity: 100 fl. oz (3.0 liters)
  • Weight: 3.8 oz (0.11 kg)
  • Dimensions: Width 7.0 inches (18.0 cm), Length 16.5 inches (42 cm)


Platypus Limited Warranty

Coverage: Original purchasers using the product as intended. Misuse, lack of maintenance, or alteration voids the warranty.

Product Lifetime: Warranty lasts until the product can no longer be used safely or effectively, not the owner’s lifetime. Usage, care, and maintenance affect this timeline.

Handling Issues: For defective items (not caused by misuse or poor maintenance), we’ll repair or replace. If the product can’t be fixed or is discontinued, we may offer a similar replacement.

What’s Not Included: Wear and tear, damage from misuse, alterations, or lack of maintenance.

Out of Warranty Repairs: We can often repair products not covered under warranty for a reasonable fee, including shipping.


This warranty doesn’t cover normal wear and tear or misuse. It’s for manufacturing defects in materials and workmanship only.

Modifications, neglect, or improper maintenance voids the warranty.

The warranty is non-transferable and only applies to purchases from authorized Platypus retailers.


This warranty gives you specific rights, and you may have other rights which vary by region.

Platypus’s liability is limited to the product’s purchase price. We’re not responsible for any consequential damages.

This is the only warranty offered by Platypus, replacing all other warranties, express or implied.