H2CAP PLUS
Hydrogen, Measured.
The H2CAP PLUS is a 53-gram, battery-free cap that turns an ordinary bottle into a hydrogen water bottle — 1,000–1,500 ppb of dissolved H2 in under five minutes, verified by an independent laboratory rather than a marketing page.
Designed and built in Incheon, Korea by BioNatural (Ionfarms) — water technology since 2001.
How it works
One Cap. Any Bottle. Measurable H2.
The H2CAP PLUS threads onto standard 28 mm and 30 mm bottles and runs on any USB source. Inside, a nine-layer platinum-coated titanium electrode with an SPE/PEM membrane generates dissolved hydrogen — and vents oxygen out the other side.
Because the H2CAP PLUS draws its power over USB instead of carrying a battery, it stays at 53 grams — light enough for a gym bag, a desk, or a carry-on. There is no charging routine and no battery to age: the cap works wherever a power bank, laptop, or wall adapter does, and a built-in cleaning mode keeps the electrode performing to specification over time. Distributors like it for the same reasons end users do: nothing to charge, nothing to break in transit, and a spec sheet that survives being checked.
Fill & attach
Fill a bottle with clean drinking water, screw on the cap, and turn it upside down.
Connect USB
Electrolysis starts automatically — max 4.5 W from any power bank or adapter.
Drink in minutes
A solid orange LED means the cycle is done — 1,000–1,500 ppb, ready to drink.
Get to know the H2CAP PLUS
Technology
SPE/PEM, explained
The chemistry and the nine-layer electrode inside the cap.
Read moreSpecifications
Full spec sheet
Dimensions, materials, power, and manual-confirmed output.
Read moreComparison
Six devices, side by side
Weight, power, ppb output, and what can be verified.
Read moreVerification
The test data
JHPA's independent 1,036 ppb result and retention curves.
Read moreThe science, read honestly
We Publish the Evidence — Including Its Limits
Molecular hydrogen has a real research literature and real open questions. Instead of cherry-picking, the H2CAP PLUS site indexes 1,345 peer-reviewed studies with direct DOI links, states plainly that human trials are the minority, and makes no medical claims. The underlying collection is compiled from the index maintained by the Molecular Hydrogen Institute, an independent educational body, with every entry resolving to its original DOI. Read our overview at hydrogen water science, or go straight to the sources.
Who builds it
A Manufacturer, Not a Reseller
The H2CAP PLUS comes from BioNatural (Ionfarms), a Korean manufacturer that has developed water electrolysis technology since 2001 — from alkaline water ionizers to portable hydrogen. We design the electrode, assemble the device in Incheon, and back it with a limited warranty and distributor-level support.
Every H2CAP PLUS is measured against the same standard: dissolved hydrogen on a laboratory-grade meter, ORP on a benchtop analyzer, and an independent check by a third-party body in Japan. When a distributor quotes 1,000–1,500 ppb to a customer, that figure traces back to instruments and a report — not to a slogan.
Read our story, or see the certifications and test reports behind the product.
Bring the H2CAP PLUS to your market
We sell wholesale to distributors in the USA, EU, Japan, and beyond — with verified test data, compliance documents, and honest numbers you can defend.