This 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.

As soon as possible is best. From the receipt date you will have 7 days to send us back your empty cylinders using the same exchange box. If you don’t, we will have to charge you €30 per cylinder for non-return.

But don’t worry if you forget: We will send you return reminder to make sure this does not happen.

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.

If you are based in the UK, drop off the exchange box with the empty cylinders at your nearest Collect+ service point.

If you are based in Ireland, drop off the exchange box with the empty cylinders at your nearest GLS service point.

The water will no longer become bubbly when you’re going through the usual carbonation steps. Before exchanging the empty cylinder, or putting it into the exchange box, you can double check that it is completely empty by depressing the center pin with a spoon. Any remaining CO2 will be removed then.

We recommend buying 1 extra cylinder, so that you always have one full one 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.

At the moment, 2 empty gas cylinders can be exchanged for full ones at a time. We are looking into providing the possibility of exchanging more cylinders at a time soon and you will see this option on this page once it's added.

We recommend buying 1 extra cylinder, so that you always have one full one 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.

Once you place the order and receive the order confirmation by email, the delivery time will then be 3-5 business days. When this new order is on its way, you will receive an e-mail with a tracking link.

Unfortunately, at the moment the delivery of Aarke CO2 cylinders is not available for Guernsey, Isle of Man and Jersey. Therefore, it is not currently possible to benefit from the Cylinder Loop service in these areas.