Should I replace the Lunette Cup once a year?

We don't think it's necessary to replace a Lunette that often.

Lunette exceeds all expectations: it's made of the best quality of medical-grade silicone. You can safely use your Lunette for several years — there's no need to replace it annually, however the FDA recommends replacing the cup every two to three years. Some users choose to replace their cup over time due to aesthetic reasons, as cups have a tendency to discolor with age. You can prevent discoloring by always rinsing your cup with cold water before cleaning it using the Lunette Feelbetter Cup Cleanser.