Beyond saving money, soda makers have a meaningful environmental upside. Every bottle of sparkling water you make at home is a plastic bottle that doesn't get manufactured, shipped, and (hopefully) recycled.
Let's look at the actual numbers.
Plastic Bottle Savings
The average household that switches from bottled sparkling water to a soda maker eliminates approximately 2,000-3,000 plastic bottles per year.
The Math
- Average sparkling water consumption: 5-7 liters/week per household
- Standard bottle size: 500ml-1L
- Annual bottles: 260-728 bottles minimum
- For heavier users (family of 4): 2,000-3,000+ bottles
Each PET bottle weighs about 25-35g. That's 50-100 kg of plastic per year that never enters the waste stream.
♻️ Recycling Isn't Enough
Even if you recycle diligently, only ~30% of plastic bottles get recycled globally. The rest ends up in landfills or the environment. Not creating the bottle in the first place is always better.
Carbon Footprint Comparison
Bottled sparkling water has a surprisingly large carbon footprint:
| Factor | Bottled Water | Soda Maker |
|---|---|---|
| Container production | High (new bottle each time) | Low (reusable bottle for years) |
| CO2 sourcing | Industrial process | Industrial process (same) |
| Transportation | Heavy (water is heavy) | None (tap water) |
| Refrigeration (supply chain) | High | None |
| End-of-life | Recycling/landfill | Minimal (cylinder reuse) |
Studies estimate home carbonation produces 79% less CO2 emissions than buying bottled sparkling water. The main savings come from eliminating transportation — water is heavy, and shipping it is carbon-intensive.
What About the CO2 Cylinders?
Valid question: aren't we just moving the carbon footprint to CO2 cylinders?
Not really:
- Cylinders are reused — same cylinder gets refilled 10-20+ times
- CO2 is captured — food-grade CO2 is typically a byproduct of industrial processes (ammonia production, fermentation), not newly created
- Transport is efficient — cylinders are small and light compared to equivalent water volume
One 60L CO2 cylinder replaces ~60 one-liter bottles. The environmental math strongly favors refillable cylinders.
SodaStream's Environmental Claims
SodaStream (owned by PepsiCo since 2018) markets heavily on sustainability. Their claims:
- "One SodaStream bottle can save up to 2,000 single-use bottles"
- "68 kg of plastic waste prevented per household annually"
- CO2 cylinders recycled through exchange program
These claims are generally accurate, though based on high-usage households. Even moderate users save hundreds of bottles per year.
The PepsiCo Irony
Yes, SodaStream is owned by the same company that sells billions of plastic bottles. Make of that what you will. The product itself is still environmentally beneficial regardless of corporate ownership.
Your Actual Impact
Let's calculate for a typical user:
Scenario: Moderate User
- Consumption: 1 liter/day of sparkling water
- Previous: buying 1L bottles
- Annual bottles saved: 365
- Plastic prevented: ~12 kg
- CO2 emissions saved: ~50 kg
Scenario: Family of 4
- Consumption: 4 liters/day
- Annual bottles saved: 1,460
- Plastic prevented: ~50 kg
- CO2 emissions saved: ~200 kg
Honest Caveats
Home carbonation isn't perfectly green:
- Machine production — manufacturing a soda maker has environmental cost (offset after ~6 months of use)
- Bottle replacement — you'll replace bottles every 2-3 years
- CO2 production — still industrial, though byproduct-sourced
- Electricity — minimal for manual machines, slightly more for electric
None of these come close to offsetting the savings from eliminating single-use bottles. The net impact is strongly positive.
How It Compares to Other Options
| Option | Environmental Impact |
|---|---|
| Tap water (no carbonation) | Best — zero waste |
| Soda maker | Very good — minimal waste |
| Glass bottled sparkling water | Good if recycled, heavy to transport |
| Canned sparkling water | Moderate — aluminum recycles well |
| Plastic bottled sparkling water | Poor — high waste, transport emissions |
If you want sparkling water, making it at home is the most sustainable way to get it.
The Bottom Line
Soda makers aren't going to solve climate change, but they do make a real difference at the household level. Eliminating hundreds or thousands of plastic bottles per year, reducing transport emissions, and reusing equipment for years — it adds up.
If you're already interested in a soda maker for convenience or cost savings, the environmental benefits are a solid bonus. If sustainability is your primary motivation, home carbonation is one of the easier eco-swaps you can make.
See also: Best Soda Makers 2026 · Is a Soda Maker Worth It? · Soda Maker vs Bottled Water