Get 90 days of sparkling water with our value bundle containing 2 bonus CO2 exchange cylinders with a convenient returns box to keep you sparkling 3 x times longer! After 90 days, simply return 2 empty CO2 cylinders in the returns box included in your order.* Paperless returns with InPost and Yodel allow you to print labels in-store. Just bring your customer number found in 'My Account' and include this on the returns label when printing. ' an automatic £10 charge will apply per cylinder that is not returned within 90 days. T&Cs apply.