When purchasing The Mini or The Maxi package, you can choose to subscribe to monthly or bi-monthly deliveries. Each month, you will receive the personalization survey to update your crystal preferences. Choosing the subscription service will allow you to take 10% off each purchase-- you save money over time AND keep a refreshed crystal collection. Subscriptions last for a minimum of 3 cycles (3 months for monthly deliveries, or 6 months for bi-monthly deliveries) and can be cancelled at any time after this.