A modern home without a soda maker is almost unimaginable today. These practical devices turn ordinary tap water into a refreshing fizz in seconds. But anyone who looks closely at the subject quickly encounters terms like soda capsules, CO2 cylinders, and the question of how to handle the empty containers. Many consumers search online for terms like "CO2 cylinder exchange" or "options for refilling". At flav&, however, we take a fundamentally different, safer, and more transparent approach: we consistently rely on a closed-loop model based on genuine material recycling.
When you buy a quality cylinder-based soda maker, you are investing not just in convenience, but also in the environment. By using our system, environmentally conscious households demonstrably save 365+ bottles per year. Combined with our innovative, durable, and completely BPA-free Fizz Bottle (deliberately developed without the risks and heavy weight of glass), you dramatically reduce your ecological footprint. In this comprehensive guide you will learn in detail how modern CO2 cylinder soda makers work and why recycling - not refilling is the only right answer to the resource question.
How do CO2 cylinders work in soda makers?
Every standard soda maker needs CO2 to bring still drinks to life - the gas that turns tap water into sparkling water. The CO2 cylinder acts as the technological heart of the entire system: it stores the required gas under extremely high pressure while the soda maker's mechanics precisely control the dosage. This way you always retain full control over the individual carbonation level of your water - from gently sparkling to intensely fizzy.
At flav&soda, the cylinders are called CO2 Fizz Cans. A key advantage for you: every single Fizz Can is filled as standard with a substantial 450g of CO2. That is exactly 25 grams more than virtually all comparable competitor cylinders on the market. For you, this extra fill means approximately 5 additional bottles of freshly carbonated water per cylinder lifecycle before the CO2 container needs to be returned to the cycle.
What is inside a CO2 cylinder?
Inside a modern CO2 cylinder is liquid carbon dioxide under high pressure. Under the high pressure applied at the factory, the CO2 takes on a liquid state. Only the moment you press the button on your soda maker does the mechanical valve open. The liquid CO2 instantly expands, becomes gaseous again, and flows in a controlled manner into your Fizz Bottle. This physical process is completely safe, extremely efficient, and operates entirely independently without the need for external power or batteries.
How much sparkling water does one cylinder make?
Yield is a key factor when you want to buy a new cylinder for your soda maker. One flav& CO2 Fizz Can carbonates up to 75 litres of water. Based on an average health-conscious consumption of around 1 litre of sparkling water per day, a single Fizz Can lasts approximately 2-2.5 months. With moderate use or a preference for gently sparkling drinks, this range extends even further. You also save yourself from carrying heavy crates of drinks while reducing your environmental impact at the same time.
The flav& return & recycle scheme - step by step
Once your CO2 Fizz Can is fully used up, flav&'s innovative and seamless return & recycle scheme kicks in. We have designed this process to be as convenient as possible for you - completely free of charge and uncompromisingly sustainable. It differs fundamentally from traditional systems where consumers have to awkwardly exchange their old CO2 cylinder at the supermarket. Our future-proof system works as follows:
- Simply collect 8 empty CO2 Fizz Cans.
- Visit the official flav& recycling page and request your free return label with just a few clicks.
- Pack the 8 empty cylinders securely and attach the prepaid return label to the package.
- Drop off the parcel at your nearest DHL ServicePoint or parcel station.
- flav& recycles the empty cylinders. Refilling the old containers never happens.
Thanks to DHL's extensive European network, returning your cylinders is completely stress-free. Thousands of DHL ServicePoints and 24-hour parcel stations are available across Europe - you can drop off your package on the way to work, during your lunch break, or while doing your grocery shop. You do not need to carry heavy boxes far. The system is so flexibly designed that it integrates into your daily routine without any additional effort - a sustainable material cycle has never been more convenient.
Why the traditional CO2 cylinder exchange at the supermarket is outdated
When carbonation runs low at home, many consumers habitually search online for terms like "CO2 cylinder exchange" or look for the nearest drop-off point at the local drugstore or discount supermarket. But the traditional exchange process at the supermarket checkout comes with numerous pitfalls in everyday life: you forget the empty cylinders in the boot, stand in a long queue at the customer service desk on Saturday, or find that the right cylinder brand is out of stock on the shelf. The constant back and forth with individual cylinders also leads to unnoticed wear on the valves and housings.
At flav&, we consciously move away from this impractical and error-prone exchange model. Instead, we have digitalised the process and moved it into the home. Rather than driving out for every single cylinder, you simply collect the cans at home. This saves you valuable time, spares your nerves, and the bundled dispatch in the 8-pack box also reduces the transport routes of our logistics partners. You no longer exchange - you use the future-proof principle of controlled return and industrial recycling.
When is the cylinder empty?
There are clear indicators of when the pressure in your Fizz Can is running low. The most obvious sign is when carbonation in the water noticeably diminishes and hardly any bubbles form despite pressing the button. With our high-end device, the flav& Fizz Maker, this can also be detected directly: the cordless soda maker no longer offers any noticeable back-pressure when the button is pressed and responds more quietly, as no more compressed gas is flowing out.
What happens to empty cylinders?
Rather than relying on outdated methods, flav& has opted for a genuine recycling system - no refilling, no reuse. The empty CO2 cylinders are recycled by flav& in a material-appropriate way. This is a fundamental difference from outdated market models that clean empty cylinders and refill them in an uncontrolled manner. Our approach guarantees 100% material purity and meets the strictest global safety and traceability standards of modern industry.
Why flav& recycles - and does not refill
The strategic decision against simply refilling is a deliberate one - based on uncompromising quality and safety standards. Recycling ensures material safety, traceability, and the highest quality standards with every new cylinder. Pressure vessels that are continuously subjected to mechanical stress, transported, and refilled in an uncontrolled manner inevitably undergo material fatigue. Hairline cracks or valve wear can result. Our consistent focus on genuine CO2 cylinder recycling eliminates these risks entirely.
When you order a new CO2 Fizz Can, you always receive a fresh product - a perfectly inspected premium product, and never a potentially worn, repeatedly reused old container. That is the difference from other systems and a quality promise from flav&: with us there is no refilling, no exchanging at the supermarket checkout, and no safety risk. We practise exclusively the consistent chain of controlled return and professional recycling.
Buy CO2 cylinders: flav& CO2 Fizz Cans
Your new CO2 Fizz Cans are available around the clock directly from the flav& online shop. You save yourself long journeys, searching for the right retailer in regional shopping centres, and tedious deposit disputes. The practical 2-pack costs only €26.00 and contains two cylinders with 450g CO2 each.
Important technical compatibility note: flav& CO2 Fizz Cans have been developed exclusively and precisely for use in flav& devices. They feature a protected, high-security special valve of valve type M11. Please never attempt to force third-party cylinders into your flav& device, as this can permanently damage the delicate mechanics.
Don't have a flav& system yet, but want to finally benefit from the advantages of our sustainable cycle? Our fully equipped Fizz Kit starts at just €44.99 and includes, alongside the soda maker in 7 colours, everything you need for immediate, plastic-free sparkling enjoyment at home.
Frequently Asked Questions
Can I refill flav& CO2 cylinders?
No. For safety and quality reasons, flav& cylinders are not refilled - they are recycled. We rely on an uncompromising system called "return & recycle". Empty containers are collected, sent back via our free label, and recycled.
How much sparkling water does one flav& cylinder make?
Thanks to the generous fill of 450g CO2 (a significant 25g more than the market average), you can make up to 75 litres of refreshing sparkling water with a single flav& CO2 Fizz Can.
How long does the return process take?
The process takes just a few minutes. The return label is issued digitally on the flav& recycling page. The return is made via DHL - simple, free, and hassle-free.
What is the safest way to store full and empty CO2 cylinders at home?
Please always store CO2 cylinders upright and securely in a cool, dry and well-ventilated place. Ensure they are not exposed to direct sunlight and that the temperature does not exceed 50°C. The cylinder should be stored so that it is protected from knocks, impacts or falling over.
Can I use SodaStream cylinders with a flav& soda maker?
No. flav& devices are compatible only with flav& CO2 Fizz Cans (valve M11). SodaStream or Aarke cylinders do not fit and should not be used. Please only use original CO2 Fizz Cans.
About flav&soda: flav&soda is a home carbonation brand based in Malta, sold across Europe. The Fizz Kit is the entry product - a cordless sparkling water maker with a BPA-free reusable Fizz Bottle and a free cylinder return & recycle scheme. Learn more
