The Aspire Spryte Pods are a convenient way to change out your expired pod or replace a coil without needing to do very much. Each pod holds a maximum of 2 ml of your favorite E Liquid at a time, but even still that is sure to last you all day long. In order to fill your pod all you have to do is take out the silicone plug from the bottom of the cartridge and squeeze your e juice in there right before you close it up well again. Allow the pod to stay put for at least 10 to 15 minutes if you are using a new coil and want to give your e juice a chance to soak up into the wick. It's also important to note that the Aspire Spryte Pods are only compatible with the Aspire Spryte.