Through Customer Support you can request to “Trade-Up” your machine. Send us your Sparkling Water Maker, and we will give you a discount on our SodaStream website to purchase a new DUO. For more details, contact our Sparkle Support team via email or phone at 0800-0223637 (NL) | 0800-74801 (BE) | 0800-28527 (LUX).