The Marinate Feature can only be used with Canisters specifically built for the marinate function everything else will use the Accessory Function. The Marinate Feature is intended to speed up the Marinate process. The Accessory Feature is intended to pull a vacuum with your Retractable handheld Sealer and can be used on Containers and Zipper Bags. Note: Both Features pull a vacuum to the proper internal setting. Cannot use the Pulse Vac Feature with these functions.