Yes, The Cylinder Loop is an on-demand subscription service. This means that after you sign up for the service and place your first order, we securely save your payment details. This way, you won’t have to place any additional orders on our website when you want to exchange your empty cylinders.

The difference from a traditional subscription model is that you (and only you) control how often your cylinders are exchanged. You will only get charged after you send us 2 empty cylinders – and the full cylinders are on their way to you. Only you decide when this happens depending on your sparkling water consumption.

There is no specific timing for a cylinder exchange in The Cylinder Loop. Just note that the exchange is always 2 cylinders at a time. So it depends entirely on how often you carbonate and drink sparkling water.

No. You will need to send back 2 empty cylinders in your return box every time.

In The Cylinder Loop, we always exchange 2 empty at a time with our exchange box.

We recommend having 3 cylinders in total at home, so you can still have one in your Carbonator, while you're waiting for the other two to be exchanged.

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.

There’s no need to manually place an exchange order on our website. The Cylinder Loop exchange works like this:

1. Once you have 2 empty cylinders, you screw the valve caps the cylinders came with back on – and put the cylinders back in the box they arrived in (the exchange box).

2. On the back of the box, place the included shipping sticker over the existing shipping label. Then put the box with your 2 empty cylinders in your mailbox or give it to a USPS carrier.

3. Once we receive a confirmation that you have posted empty cylinders, we will automatically charge you $42.00 for the 2 full exchange cylinders and send you a tracking number for them. That’s it! The full gas cylinders will be delivered to you with FedEx fast shipping.

Usually, yes. But it depends on the condition and model of your gas cylinder. We accept standard 400-425g (14.5 oz) /60L gas cylinders approved for use with sparkling water makers.

We do not accept cylinders that are damaged. We do not accept the Soda Stream Quick Connect cylinders with the pink ring.

In all other cases, yes – you can exchange your 2 empty cylinders from another brand to get started with The Cylinder Loop.

For The Cylinder Loop, FedEx will send out the full cylinders to you, while USPS sends the empty ones to us.

Please note that if you order the Carbonator together with the start exchange box and CO2 cylinders, the parcels might arrive at different times due to the packages being sent from different locations.

Since the cylinders classify as hazardous goods, they must be shipped with ground transportation which effects the delivery time. Once USPS confirms to us that they have your exchange cylinders, we initiate your cylinder order. The delivery time will then be 2-5 days. When this new order is on its way, you will receive an e-mail and a tracking link.

Please enter your ZIP-code in the field above to check if we offer The Cylinder Loop gas exchange service in your area.

If not, please know that we’re working on getting The Cylinder Loop available in the entire US as soon as possible. Please check back soon!

Yes. You will be asked to create an account at checkout to proceed with your order. This is required to enable us to securely store your payment method and automatically charge it when you decide to exchange your 2 empty cylinders in the future.

It’s easy. Just stop giving the exchange box with 2 empty cylinders to USPS and you will never be charged for an exchange again.

If you no longer want us to store your payment information, contact info@aarke-usa.com and we will delete your data from our system. If you are a registered user, your account, purchase history and quick checkout address information will also be deleted, since they are connected.

No. Aarke gas is not a discounted item and discount codes will not be applied to gas in your cart.