Read the stated micron rating, the flow, and the cartridge life · review
NATURBUMMLER foldable 750 ml filter bottle, 200 litre cartridge review
A rollable 750 ml filter bottle that publishes its volume and a 200 litre cartridge life, and gives no pore size at all — the shortest stated cartridge figure on this shelf with the least said about the element behind it.
The bottom line The bottle is honest about its volume and its cartridge, and silent about everything that describes the element. That silence is the reason to hesitate.
What this listing puts on record
A 750 ml volume, a foldable and rollable bottle, a three-stage filter system, a cartridge life of 200 L, a carabiner, and a description of the whole as ultralight.
The empty column
No pore size. Not in the title, not in the bullets, nowhere. Six of the nine filters in this family publish one, and this is one of the three that does not. It is the single figure that describes what the element is built to hold back, and its absence is not something the three-stage claim replaces.
No named stages either. Three is a count. It does not say whether the stages are a membrane and two pre-filters, or carbon three times over.
The figure it does publish
200 litres. That is stated, and it is short. Set against the 4000 and 5300 litre figures elsewhere on this shelf, it changes how often a replacement is bought — which is precisely why the number belongs in the title, and it is there.
How the maker’s claims are written here
The bullets carry a 99.99 % figure for bacteria and germs. It is reported here in one form only, with its author attached: the maker states 99.99 % of bacteria. This page does not say what the filtered water may be used for. The maker’s instructions and the local authority where you are filling are what answer that.
Before ordering
Look at the cartridge figure against how you walk. Two hundred litres is a season of weekends or a fortnight of hot days, and the replacement element is the cost that follows the bottle.
Availability
Selling at about 30 € on the German Amazon store when this page was checked.
Nothing came back from the American, British, French, Italian and Spanish Amazon stores, so the buy link there opens a local search instead of a page that is not there.
Every figure in this section is what Keepa returned on the day this page was last updated. Prices and offers change without notice.
Prices quoted in this text were read on 6 September 2026. The live price is at the top of the page.
What it does well, and where it gives way
Strengths
Publishes the bottle volume at 750 ml, which is a real number and larger than several bottles on this shelf
Rolls up when empty, which is the property that decides whether a filter bottle stays in the pack all season
The cartridge figure is stated plainly in the title rather than buried
Compromises
No pore size anywhere, so the column this hub leads with is empty
A three-stage system is claimed and the three stages are never named, which leaves the element undescribed
200 litres is the shortest cartridge life published here, and there is no flow figure or weight to set against it
Specifications
Micron rating
Not published on the listing
Filter element type
A three-stage filter system — stated; the three media are not named
Stated flow rate
Not published on the listing
Cartridge life
200 litres — stated in the title
Weight
Not published on the listing — described as ultralight, without a figure
Format
Foldable, rollable 750 ml filter bottle with a carabiner — stated
Bottle thread compatibility
Not published on the listing — the filter is part of the bottle and no thread size is published
Amazon reference
B0C81BR54S (same reference on 1 Amazon marketplace)
EAN
4262372760050
What people ask before buying
Is 200 litres a lot?
It is the shortest cartridge figure published on this shelf; others state between 1500 and 5300 litres. Cartridge life is what decides running cost, so a short figure is worth knowing before rather than after, and this one is at least printed in the title.
What does three-stage tell you?
On its own, very little. Makers who publish stages usually name them — a membrane, a carbon block, a pre-filter — and this listing names none of the three. The count is a claim about complexity, not about pore size.
Press filter bottle · 500 ml · 0.2 micron stated · hollow fibre with carbon · 1500 litre cartridge
A 500 ml press bottle that publishes volume, pore size, element type and cartridge life — four of the seven columns this hub compares — and quotes the coarsest micron figure of the six filters here that give one.
Best for: A short walk or a run where one small bottle refilled at the stream is the whole water plan.
Filter and bottle set · 0.1 micron stated · hollow-fibre membrane · 4000 litre cartridge · 0.5 L bottle
A hollow-fibre filter sold with the bottle it screws onto, publishing both a 0.1 micron pore size and a 4000 litre cartridge life — and, because the bottle comes in the box, never needing to say what thread the filter takes.
Best for: A day walk where the water is refilled often and the whole set can live in a hip pocket.
Press bottle · 710 ml · 250 litre replaceable cartridge · no pore size published
A 710 ml press bottle with a replaceable cartridge rated at 250 litres, and the most talkative claim list on this shelf — every one of which is written here as the maker’s claim, because no pore size is published to check any of it against.
Best for: Travel where one bottle is treated at a time and the cartridge is expected to be replaced as a routine cost.
