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Hoser

Simple, lightweight hydration system.

The Hoser hydration system is a light, versatile hydration system that has become a backcountry classic. It has a simple, durable design that is practical for any activity and it comes in four handy sizes to fit practically any pack.

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The Hoser hydration system is a light, versatile hydration system that has become a backcountry classic. It has a simple, durable design that is practical for any activity and it comes in four handy sizes to fit practically any pack.
  • Taste-free as well as BPA-, BPS-, and phthalate-free.
  • Food-grade liner with rugged exterior is pliable and durable.
  • Embedded silver-ion protects bottle from mold and bacteria.
  • Hydration hose with lapel clip and Hyperflow™ bite valve makes it easy to drink on the go.
  • Screw-top closure stands up to rugged use.

Compatible with any threaded Platy lid or drink tube.

Made in U.S.A. of U.S. and Imported Materials
1 LTR 1.8 LTR 2 LTR 3 LTR
Color No No No No
Style No No No No
Capacity (Standard) 34 fl. oz 60 fl. oz 70 fl. oz 100 fl. oz
Capacity (Metric) 1 liters 1.8 liters 2 liters 3 liters
Weight (Standard) 3.2 oz 3.4 oz 3.6 oz 3.8 oz
Weight (Metric) 91 g 97 g 102 g 109 g
Width (Standard) 5.25 in 6.75 in 6 in 7 in
Width (Metric) 13.5 cm 17 cm 15 cm 18 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
Film Polyurethane / Polyethylene Polyurethane / Polyethylene Polyurethane / Polyethylene Polyurethane / Polyethylene
Spout material Polyethylene Polyethylene Polyethylene Polyethylene
Bite valve material Silicone Silicone Silicone Silicone
Finger loop material Polyethylene Polyethylene Polyethylene Polyethylene
Drink tube material Polyurethane Polyurethane Polyurethane Polyurethane
Country of Origin Made in U.S.A. of U.S. and Imported Materials Made in U.S.A. of U.S. and Imported Materials Made in U.S.A. of U.S. and Imported Materials Made in U.S.A. of U.S. and Imported Materials
No. All Platypus hydration products are 100% BPA- and BPS-free, and are made with durable urethane and food-grade, taste-free polyethylene interiors.
Use hot, soapy water and rinse thoroughly with hot water. For tough cleaning jobs, add 1/4 cup of baking soda to 3/4 cup of water per liter volume of your bottle or reservoir and shake for 30 seconds. Add 1/4 cup lemon juice, shake 10 seconds, and vent by loosening cap away from face. Repeat shaking and venting three times. Expel as much air as possible, cap bottle, and allow to soak 20 minutes. Rinse three times with hot water. Caution: When adding lemon juice to baking soda, effervescence occurs and will cause pressure to build in a capped Platypus product.
Platypus bottles can be dried by blowing a little air into them to expand them and letting them stand uncapped until the water evaporates. Hang Hoser™ reservoirs from their carry loop to dry. Drying Big Zip™ reservoirs is easy, with a dishtowel through the large opening. Then prop them open with the SlideLock slider and let them air dry. Another great way to dry all reservoirs and bottles is with a plastic bag dryer, widely available at kitchen supply stores and numerous online retailers.
You can put a variety of beverages in your Platypus bottle or reservoir. Just make sure you clean it thoroughly after each use to prevent bacteria from growing in the reservoir and/or tube.
To disinfect, fill the reservoir or bottle with a solution of unscented household bleach and water at a concentration of 2-5 drops per liter of water. Close and mix for 10 seconds. Fill hoses and bite valves by squeezing bite valve, being careful to keep valve over sink. Leave filled overnight. Rinse thoroughly and air dry. For a more planet-friendly alternative, use a chlorine-free, hydrogen peroxide-based bleach alternative like Free and Clear™ available from Seventh Generation®.
A frozen Platy bottle makes a great ice pack and, during the dog days of summer, delivers a steady source of cold, refreshing hydration. Lay it half-full on its side in freezer with all air purged. Do not over-fill. Water expands as it freezes and this can burst your reservoir or bottle.
Does your hydration system have a shutoff valve? If so, it may be closed. Open it by twisting the bite valve 90 degrees (Clockwise closes it, Counter-clockwise opens it). If that doesn’t work, you may be biting the valve too hard. The Platy HyperFlow Bite Valve is designed so that you don’t need to bite very hard. If you bite too hard the flow will be completely cut off. With your teeth, compress the valve lightly (only 30% to 50%) and water should flow.
The best way to restore a snug fit between the bite valve and the drinking tube is to remove the bite valve from the drinking tube. Next, cut a small section off the end of the drinking tube. Clean the bite valve and hose with rubbing alcohol, lick the end of the drinking tube and place the bite valve back on the end of the drinking tube. After it dries, there should be an excellent seal.
Using our Bite Valve & Drink Tube Insulator is an easy solution to deter freezing. Additionally, to help prevent the water in the reservoir from freezing, start off the day with warm or hot water in the reservoir, then pack your extra clothing layers around it. To help keep drink tubes and bite valves from freezing up, sip often to maintain flow, and, after you’ve finished drinking, blow any residual water back into the reservoir. Also, even if you are using the Bite Valve & Drink Tube Insulator, it still helps to keep as much of the drinking tube covered as possible, such as routing it inside a pack, strap, or jacket.

First, remove your HyperFlow™ bite valve by pulling straight out and off the hose. Then simply slide the cover onto the hose and reattach your bite valve.

Yes. Periodically adding a little Vaseline to the tracks will keep them supple and easy to close. Wipe away excess Vaseline to keep it from getting in your water and to prevent it from collecting dirt. In the field, a little lip balm or similar item can do the trick.
Absolutely. Simply turn your reservoir upside down after filling it. Then simultaneously squeeze the reservoir and the HyperFlow bite valve until all the air is purged. Bye, Bye sloshing.

E-mail: Cascade Designs Service Center
Tel: 1-800-531-9531

Yes. Simply remove the bite valve on your hydration system and connect the end of the hose directly to your filtration system’s outflow port. Using a GravityWorks™ filter system, your reservoir can take the place of the supplied Clean reservoir, creating what is arguably the lightest, most compact and efficient way possible to get water. GravityWorks™ filters are available with direct-to-reservoir and direct-to-bottle adapters for optimum versatility.
JenIAm
September 12, 2016
No, I would not recommend this to a friend
leaky connection
I purchased this for a trip to Peru thinking my older one was about 4 years and I didn't want to chance a leak on this trip. My bad, I did not check it before my trip so imagine my dismay when I filled it the night before leaving to hike the Inca trail in Peru and guess what? It leaked like a sieve. Fortunately I had been using my old one with a filter for drinking water in the hostel and had that, or I would have been without on the trail. VERY DISAPPOINTED.
2bigfeet
April 28, 2016
Yes, I would recommend this to a friend
Easy to use
Easy to fill, easy to clean, lightweight, very durable and nice that the hose can be used on smaller platy bottles. Love the versitility and durability of these platy bags.
Apple5
April 20, 2016
Yes, I would recommend this to a friend
Skeptic Before Use
I was super skeptical of any of these hydration systems (no matter the brand). I was finally talked into my 3L system during my last backpack purchase. I'm pretty glad I pushed passed my skepticism. There is no added smell that I can gather (and I am a super taster, who used to be a raw food chef). The only thing I'm having a slight issue with - is the cleaning of the hose. Even just to run water through it without actually biting the valve seems troublesome. It could be that I'm not familiare enough and not gonna knock it yet. I'm also gonna get the cleaning kit once I can afford it.

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