With 3ml capacity, the Aspire Flexus Stik Replacement Pods are designed to be compatible with the Flexus Stik Kit. It supports both MTL (Mouth to Lung) and RDTL (Direct to Lung) vaping styles making them totally compatible with 50PG and High PG e-liquids that you can fill from the pod's base.. The Flexus Stix pods are designed to house the Aspire AF Mesh Coils and are easy to change with thanks to push fit atomisers.