Geekvape Mero Pod Cartridge is specifically developed for the Geekvape Mero AIO Kit. Mero Pod holds up to 3ml of e-liquid. To inject e-liquid, simply lift up the sealing ring around the top of the pod. https://www.vapeuniverse.co/products/geekvape-mero-empty-pod?pr_prod_strat=e5_desc&pr_rec_id=d907e419b&pr_rec_pid=8277913501948&pr_ref_pid=8519640973564&pr_seq=uniform