Inkjet Sealing Plugs to seal Inkedibles Edible Ink Cartridges Did you know that Inkedibles cartridges are REFILLABLE? They are made this way by design, to give you more flexibility and lower cost options to refill your Inkedibles ink cartridges. These sealing plugs are used to plug the refill port on your Inkedibles cartridges. It is recommended that you refill the same cartridge no more than 2-3 times in order to preserve the best quality prints, as cartridges do deteriorate with multiple uses.