You are more than welcome to bring your own drinks to have after the session, but keep in mind drinks, Eskies, backpacks and bags cannot be taken out onto the playing fields. We recommend leaving your drinks in the car in an Eski until you are done.
Once you leave the compound you are out on the playing fields for the entirety of the session, cold drinks are available for purchase on the fields in the rest areas throughout the session and can be clicked off your player tag and paid for at the end.