A device for controlling package pressure and gas flow for a packaged good comprises a film having a first opening for exposure to the inside of a package and a second opening for exposure to the outside of a package. A channel extends between the first opening and the second opening. The dimensions of the channel are configured to control the rate of flow of CO2 (cc/min @ 1 PSI) from the inside of the package to the outside of the package and control the oxygen transmission rate (cc/day/Atm) from the outside of the package to the inside of the package so that a flow of CO2/OTR ratio is at an acceptable level for the packaged good.