Are replacement flasks available for purchase?

Hydrapak Seeker compatible flasks can be purchased separately. I got the larger 2L.

How is swishing water inside cleaning the filter? Wouldn't that just redistribute bad stuff around instead of it actually leaving the filter?

The agitation loosens the debris from the filter. It’s the same action as backflowing a Sawyer. The Katadyn filter is exposed and moves more freely allowing debris to fall out . But for a long trip this should only be a back up it is fragile.

going overseas and will not be able to drink tap water. Can I fill this from tap and assume I can then drink the water?

I would say yes. However, I like to treat a liter of tap water with a chorine tablet each evening so that I have a full liter of purified water every day. I think the Katadyn tube holds less than a half liter.

Can you use purifying tablets/drops in the bottle along with the filter in place?

You probably can, but why? The point of this filter/bottle is that it purifies water to 0.1 microns. This takes care of all cysts, Protozoa, bacteria etc.

Hydrapak 0 6lの折りたたみフラスコが付いているkatadyn Befree水フィルター

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Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💦 Squeeze, Filter, Go — Hydration Made Effortless

TRUSTED SAFETY - Filters water from lakes, rivers, and streams with a max TDS of 500 PPM—drink confidently wherever you roam.
FAST FLOW NO WAIT - Enjoy up to 2 liters per minute filtration speed—stay refreshed without delay.
EFFORTLESS CLEAN UP - EZ-Clean membrane lets you quickly flush out contaminants, keeping your filter fresh and ready.
LIGHTWEIGHT DURABLE - Weighing just 58g, this synthetic bottle is built tough for all your outdoor adventures.
HYDRATE ANYWHERE ANYTIME - Compact 0.6L folding flask fits in pockets and packs for on-the-go hydration.

The Hydrapak Katadyn Befree Water Filter combines a 0.6L collapsible flask with a high-performance EZ-Clean membrane filter, delivering up to 2 liters per minute of purified water. Lightweight at 58g and designed for easy maintenance, it’s perfect for outdoor professionals and adventurers who demand quick, safe hydration on the move.

Specifications

ASIN	B01M0MZ7NI
Amazon Bestseller	#271,214 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #209 in Drinking Flasks
Brand Name	Katadyn
Capacity	0.6 Liters
Container Type	Bottle
Customer Reviews	4.6 4.6 out of 5 stars (1,375)
Global Trade Identification Number	00604375196391
Included Components	Water Filter Unit Included Components
Installation Type	Freestanding
Item Dimensions L x W x H	7.1L x 7.1W x 23.1H cm
Item Weight	0.26 Pounds
Manufacture Year	2023
Manufacturer	Greys Distribution
Material Type	synthetic
Maximum Flow Rate	2 Liters Per Minute
Model Name	8019639
Model Number	8019639
Other Special Features of the Product	Pockets
Power Source	Manual operation
Purification Method	Filter
Supported Water TDS Level Maximum (PPM)	500
UPC	604375196391
Unit Count	1 Count

Reviews

S**T

北海道で山岳渓流に釣りに行った時に使用しました。沢の水を飲みましたが、腹痛など起きずに問題なく水を飲む事が出来ました。心配な時は煮沸消毒して飲むのが一番だと思います。

8.12.2025

M**E

Is hoor een trekkingtocht komende zomer.

16.01.2025

R**A

Safe water to drink, anywhere. Long hikes, day hikes, you find a stream a river a lake or a waterfall. This is bloody useful and accompanied me everywhere

28.05.2022

P**O

Works as seen on TV, lol. Just be aware to keep the top away from the unfiltered water source, fill the bottle, top on, drink. Once empty it can be balled up and fits well in my backpack waistbelt pocket.

6.01.2026

O**E

Super easy to use. Simple enough to handle it. Felt safe when using it.

24.05.2022

G**.

super, macht alles was es solll

24.01.2026

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5 days ago

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