Most people should buy the Echo Flask, not the Echo Go+. The Flask reaches higher hydrogen concentrations (up to 8 ppm vs 4.5 ppm), has a larger capacity, retains hydrogen 3x longer, and includes smart app features. The Echo Go+ has been discontinued by Echo Water, making the Flask the only current-model option with full warranty support.
I own both bottles. The Echo Flask is the better buy in every measurable category. If you're choosing between these two Echo products, go with the Flask.
Echo Flask vs Echo Go+: Full Comparison
| Feature | Echo Flask | Echo Go+ |
|---|---|---|
| Hydrogen Output | Up to 8 ppm (20 min) | 2.5-4.5 ppm (5-10 min) |
| Capacity | 12 oz (350 ml) | 9.5 oz (280 ml) |
| Hydrogen Retention | 10+ hours sealed | 3-5 hours |
| Smart Features | Bluetooth app, LCD touch screen | One-button operation |
| Battery | 2000 mAh, 7 cycles | 1500 mAh, 5-10 cycles |
| Charging | USB-C | USB-C (can use while charging) |
| Self-Cleaning | Built-in cycle | 3-min cycle |
| Warranty | 5 years | 5 years |
| Price | $299.99 | $249.95 (Discontinued) |
| Status | Current Model | Discontinued |
Hydrogen Output Differences
The Echo Flask produces up to 8 ppm in a 20-minute cycle and approximately 6 ppm in 10 minutes. The Echo Go+ produces 2.5-4.5 ppm in 5-10 minute cycles. That's nearly double the hydrogen per serving with the Flask.
Hydrogen retention is another major gap. The Echo Flask holds hydrogen for 10+ hours sealed, meaning you can prepare water in the morning and drink it throughout the day. The Echo Go+ only retains hydrogen for 3-5 hours, requiring more frequent cycles.
Portability
The Echo Go+ is slightly lighter (0.88 lb vs 1 lb) and smaller. It also has shorter cycle times (5-10 min vs 10-20 min) and can be used while charging, which is convenient for travel. If ultralight portability and fast cycles are your top priority, the Go+ has a small edge here—but the Flask's superior hydrogen output and retention more than compensate for the extra weight.
Who Should Buy Each Bottle
Buy the Echo Flask if:
- • You want the highest hydrogen output available
- • Smart app tracking appeals to you
- • You want full warranty support on a current model
- • Long hydrogen retention matters (10+ hours)
- • You're buying your first Echo bottle
The Echo Go+ was better for:
- • Ultra-budget buyers (when it was available)
- • People who preferred simpler one-button operation
- • Using while charging on the go
Note: The Echo Go+ has been discontinued.
Clinical Recommendation
In my practice, I now recommend the Echo Flask exclusively. The higher hydrogen output, better retention, and active warranty support make it the clear choice. If you already own an Echo Go+ that's still working well, there's no urgent need to upgrade—but when it's time for a new bottle, go with the Flask.
Read my full Echo Flask Review for complete specs, pros, cons, and real-world testing results. For cleaning instructions, see our dedicated guide.
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