What is the Aarke CO2 Refill Service?

The Aarke CO2 Refill Service is an on-demand cylinder exchange program. You receive full CO2 cylinders delivered to your door and return your empty ones in the same reusable box.

What does “on-demand” mean?

On-demand means that you you can order a gas cylinder refill at any convenient time and only when you need it, instead of it occurring at a specific time interval like with traditional subscription models. When you place your first gas cylinder refill order, we will securely save your payment details. This way, if you ever want to refill your cylinders with us again, you could log in to our website and place a new gas cylinder refill order in just one quick step.

What type of cylinders are compatible with the service?

All 425g / 60L screw-in cylinder(s) approved for use with sparkling water makers are compatible with our refill service. -- Damaged cylinder(s) and Soda Stream Quick Connect cylinders (with the pink ring) is not compatible with our refill service. If your cylinder is not compatible or you don't have any empty gas cylinders at home you can simply buy new Aarke gas cylinders here first, and come back for a refill later.

What is the difference between Aarke CO2 cylinders and other brands?

Aarke CO2 cylinders use food-grade CO2 produced exclusively from 100% renewable sources within the EU. This means the gas is captured from existing processes in the ecosystem, rather than extracted from fossil fuels. By using CO2 from renewable sources, Aarke cylinders help reduce environmental impact, as no new fossil CO2 is introduced into the atmosphere. This makes carbonating your water a more sustainable choice.

How does the refill service work?

The Aarke CO2 Refill Service is designed as a simple cylinder exchange. First, you place an order for a CO2 Cylinder Refill to replace your empty gas cylinders. Once your order is processed, fresh cylinders are delivered directly to your door in a reusable return box. After receiving the delivery, place the same number of empty cylinders back in the box. Attach the prepaid return label included in the package and drop the box off at your nearest service point within 7 days. Once your empty cylinders are returned, they are inspected, refilled, and prepared for the next exchange cycle. This circular system helps ensure that cylinders are continuously reused and ready for future refills. After your first purchase, your details are securely saved to make future orders even easier. Whenever you need a refill again, simply log in to your account and place a new gas cylinder refill order in one quick step.

How long does delivery take?

Once your order is confirmed, your refill will arrive within 3–5 business days . All subscription orders include free shipping, delivered straight to your door.

How many cylinders can I refill at once?

At the moment, 2 empty gas cylinders can be exchanged for full ones at a time. We recommend buying 1 extra cylinder , so that you always have one full to power your sparkling water maker. This way you won't have to wait until all your cylinders are empty to place a refill order.

Do I need to return my empty cylinders?

Yes. The refill service works as a cylinder exchange system, so the same number of empty cylinders must be returned. If empty cylinders are not returned within the allowed timeframe, an additional charge will apply per non-return cylinder.

When should I return my empty cylinders?

Please return your empty cylinders within 7 days after receiving your refill using the exchange box and prepaid label provided. If empty cylinders are not returned within the allowed timeframe, an additional charge will apply per non-return cylinder.

What happens if I don’t return my cylinders?

If empty cylinders are not returned within the allowed timeframe of 7 days from the receipt date, an additional charge will apply per non-return cylinder.

Where should I drop off the box with empty cylinders?

Returning your empty cylinders is simple. After receiving your full cylinders, place the empties back into the same exchange box, attach the prepaid return label, and drop it off at the designated courier for your country: Germany: DHL Austria: DPD France: La Poste Belgium: DPD Netherlands: PostNL Ireland: DPD Switzerland: Please contact our support team for assistance with returning your cylinders. If you have any questions or experience any issues when returning your empty cylinders, please reach out to our support team here .

Why does a "non-return" charge apply if I don't send back my empty cylinders within 7 days?

The reason for this is that we offer a gas cylinder refill at a cheaper price than if you would be buying a completely new cylinder. Receiving back empty cylinders is essential for us to enable a smooth refill service for all our customers. Therefore, if you don't return the corresponding number of empty cylinders to us on time, we would need to produce new empty cylinders to fill with CO2 gas. This is why a charge for non-return applies if you decide to order a refill and receive full gas cylinders from us without returning empty cylinders back to us.

Carbonator 3 Steel

Coffee Maker Steel

Purifier Large

CO2 Cylinders

Never run out of sparkling water with CO2 from Aarke. Buy starter cylinders when you’re getting set up, or join our hassle-free CO2 Refill Service to exchange your empty cylinders for new ones – whenever you need it. Filled with 100% renewable, high-quality food-grade CO2 gas.

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Refilled empty cylinders with us before? Login here

Gas Cylinder Refill Gas Cylinder Refill

Exchange empty CO2 cylinders

Regular price: €35 €35

CO2 Gas Cylinders CO2 Gas Cylinders

Buy start CO2 cylinders

Regular price: €55 €55

CO2 Gas Cylinder CO2 Gas Cylinder

Buy start CO2 cylinders

Regular price: €30 €30

Benefits of the Aarke CO₂ Refill Service

✓ Never run out of sparkling water
✓ Save up to 36% as a subscriber
✓ No monthly fee or binding period
✓ Free shipping – delivered straight to your door
✓ Flexible and easy – exchange when you need it
✓ Filled with 100% renewable, food-grade CO₂ gas

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Multiple aarke co2 cylinders arranged on a light gray background. 100% renewable gas.

How does it work?

1. Order a CO2 Cylinder Refill to replace your empty gas cylinders.

2. Fresh cylinders are delivered to your door in a reusable return box.

3. Put the same number of empty cylinders back in the box.

4. Attach the prepaid return label and drop the box off at your nearest service point within 7 days*.

5. We refill and reuse your returned cylinders to prepare them for the next exchange.

6. Enjoy a seamless refill cycle whenever you need it. Your details are securely saved after your first purchase. Simply log in to your account and place a new CO2 cylinder refill in one quick step.

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