If you have used your first 4 cylinders, it's simple to get sparkling again.
Just log-in to your personal account here and click "Order Gas Cylinder Delivery". Within 2-3 business days you'll be sparkling again ;).
Don't forget to get your used gas cylinders back to our warehouse no later than 30 days from the date you have placed your new gas cylinders order.
If you have used all of your 12 gas cylinders and you want to get more gas, simply take up an early renewal and get back to sparkling again.