The Bluapple Classic Produce Saver is an essential part of produce storage to help you reduce waste and save money. By absorbing the ethylene gas given off by fruits and vegetables, the Bluapple Classic Produce Saver will keep your produce fresh up to 2-3 times longer than normal. Each Bluapple Produce Saver has an active ingredient packet inside that will last about 3 months. You can sign up for email reminders HERE to be reminded to change your packet every 90 days! Keep any unused packets in an air-tight container, like the resealable foil pouch they come in, and they will last indefinitely.