The Aspire Cobble Pods are compatible for use with the Aspire Cobble Pod System. These refillable pods hold 1.8 ml of your favorite salt nic juices or even free-based liquids. This pack comes with a total of three pods. Aspire Cobble Pods Specs 1.8ml capacity (About 250 puffs) Refillable Pods (Nic Salt or Traditional eJuice) WARNING: This is an advanced user item. Use at your own risk! Please ensure that proper precautions are taken when using such devices. Please read and make sure you understand the users manual before use.