The Bluapple One-Year Combo Pack contains a one-year supply of packets (8) for the included two Bluapples. Each packet is designed to last about three months. Just place a Bluapple wherever you store produce. The remaining packets need to stay in the package they came in or an airtight container. Bluapple keeps produce fresher longer by slowing down the rate of spoilage by absorbing ethylene gas, the gas the signals produce to ripen. By absorbing and neutralizing the ethylene gas, produce stays fresher longer!