“I’d take the 400 mL iBottle+: glass, more water per fill and A$199 delivered in Australia.”
Sam, iBottle
I’d pick iBottle+ 400 mL over the AlkaViva Hi Output H2 210 mL. The reason is simple: a larger glass drinking vessel and an A$199 delivered price. AlkaViva’s Australian listing also displays $199, but for a 210 mL polymer bottle.
If you’re choosing between these two, I’d start with what you’ll actually carry and drink from each day. A headline hydrogen number only tells part of the story.
iBottle+ 400 mL. Unique branded artwork based on our product image.
iBottle+ vs AlkaViva: the buying details
| Detail | iBottle+ 400 mL | AlkaViva Hi Output H2 210 mL |
|---|---|---|
| Listed price | A$199, free Australian shipping | $199 on its Australian store; check delivery at checkout |
| Capacity | 400 mL | 210 mL |
| Drinking vessel | Borosilicate glass | Food-grade polycarbonate in the specifications |
| Hydrogen generation | SPE/PEM, five minute cycle | SPE/PEM, five or ten minute modes |
| Output information | Published 400 mL report: 4,050 ppb at five minutes; 6,200 ppb after two cycles | Advertised ranges: 2,000 to 3,000 ppb at five minutes; 3,000 to 5,000 ppb at ten |
Checked 1 October 2026. AlkaViva has a separate 280 mL model, so don’t mix its specifications into this 210 mL comparison. Its stated ranges depend on source water.
Why I’d choose the larger glass bottle
iBottle+ 400 mL gives you another 190 mL per fill. That’s nearly twice the capacity of the 210 mL model. If your bottle lives on your desk, more water between refills is a practical advantage you’ll notice without needing a stopwatch or test kit.
I’d also choose borosilicate glass for the drinking vessel. It’s the reason I recommend the 400 mL iBottle+ here. Glass still needs sensible care, but if that’s what you want to drink from, there’s no need to settle for a smaller polymer chamber at a similar listed price.
For a more compact design, iBottle+ also comes in 230 mL at A$199. The 400 mL version remains my pick for this comparison.
Read the report behind the number
Our published iBottle+ report STECH-IBP-0225 identifies a 400 mL bottle, distilled water at 20°C and H₂Blue reagent titration. It records means of 4,050 ppb after one five minute cycle and 6,200 ppb after two consecutive cycles.
AlkaViva’s bottle page includes an independent-results section, but that section describes water-filter contaminant removal. A filter report answers a different question from a bottle’s dissolved hydrogen output. I wouldn’t treat the two as interchangeable.
The figures in the table aren’t a controlled test of both bottles together. My recommendation rests on the glass vessel, capacity and accessible iBottle+ model-specific report. Our testing overview explains the report information in more detail.
A bottle you can keep using
iBottle+ adds an IP67 water-resistance rating and a self-cleaning mode. For the 400 mL version, we also sell a matching replacement glass kit. If the glass needs replacing, having a compatible part available is useful.
AlkaViva’s specifications include USB-C charging, an OLED display and a one year warranty. Those features don’t change my preference for the larger glass vessel. Before ordering, compare the full delivered total: iBottle+ includes Australian shipping, while AlkaViva’s shipping policy says charges are calculated at checkout.
My winner is iBottle+ 400 mL
iBottle+ is my best overall choice between these two bottles. At A$199 delivered in Australia, the 400 mL glass version gives me the combination I’d want: more water per fill, published cycle results and a replacement glass option.
Choose your iBottle+ 400 mL, or read our best overall and best value guide if you’re deciding which iBottle model suits your budget.
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