There are two varieties of SMOK RPM 85/100 Empty Pod available: one is compatible with RPM 2 Coils and the other with RPM 3. It has a 6ml capacity, an easy top filling mechanism, and a child-resistant construction. It is compatible with Smok RPM 85/Smok RPM 100 Kits. https://www.vapeuniverse.co/products/smok-rpm-85-100-empty-pod?pr_prod_strat=e5_desc&pr_rec_id=9abade5d5&pr_rec_pid=8191211471100&pr_ref_pid=8191212683516&pr_seq=uniform