Platypus Hoser Reservoir

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Capacity: 3L / 100oz
Sale price£28.05 Regular price£33.00


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: 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 Platy experience: All materials are certified taste-free, BPA-free, BPS-free, and phthalate-free.
  • Funk-free: Embedded silver-ion protects reservoir from mold and bacteria.
  • Versatile: Threaded port and 1/4" diameter drink tube make it easily compatible with accessory caps and adaptors.


Capacity (Standard) 34 fl. oz 60 fl. oz 70 fl. oz 100 fl. oz
Capacity (Metric) 1.0 liters 1.8 liters 2.0 liters 3.0 liters
Weight (Standard) 3.2 oz 3.4 oz 3.6 oz 3.8 oz
Weight (Metric) 0.09 kg 0.10 kg 0.10 kg 0.11 kg
Width (Standard) 5.2 in 6.7 in 6.0 in 7.0 in
Width (Metric) 13.5 cm 17.0 cm 15.0 cm 18.0 cm
Length (Standard) 11.5 in 11.5 in 16 in 16.5 in
Length (Metric) 29 cm 29 cm 40.5 cm 42 cm
Height (Standard) 0 in 0 in 0 in 0 in
Film Polyurethane / Polyethylene Polyurethane / Polyethylene Polyurethane / Polyethylene Polyurethane / Polyethylene
Spout material Polyethylene Polyethylene Polyethylene Polyethylene
Bite valve material Silicone Silicone Silicone Silicone

Customer Reviews

Based on 4 reviews
Seam split.

My previous Platypus had worked well for a long while. The seam split on the replacement I ordered whilst trying to fill for the first time. Have returned and requested a refund.

Hi Ron,

As per our email last week we have provided a returns label as we believe the item to have a manufacturer defect and will refund you fully.

Apologies for any inconvenience caused.

Safe travels,

Ben Wells
Failed first time using it...

Chose a Platypus reservoir as I'd had my old one for 20+ years, great when snowboarding in my backpack etc. Recently gotten in walking, so decided to freshen up my gear, and having been so impressed with my old Platypus, stuck with the brand.

New one failed during the very first use. Filled it with less than 2ltrs of water, and as I was putting it into the compartment on my back pack, it split along one seam, about an inch long, and dumped most of the contents into my bag.

Not impressed. Not sure if it's a manufacturing fault, or just a decline in quality but not great at all.

Hi Ben,
We are so very sorry to hear this, we have been in touch via email and will get this resolved.
Safe Travels,

Kyrle du Heaume
platypus hydraton system

I bought this as a present, so can't comment on this product. but in the past I've found Platypus hydrations much better than other makes, which is why I choose Platypus for a present.

Charlotte Cordingley
THames path

Hydratated wee with your product on 70mile walk

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