Versatile tanks... Kanger Subtank mini or plus... or the Aspire Triton2.
The ST+ has larger capacity than the mini, and both can use RBA deck or pre-built coils which are available in Kanthal, Ni200, and Ti. The Triton is top-fill, moderate capacity and has an available RBA (sold separately). Both are excellent daily-use tanks and can handle sub-ohm vaping or 'standard' vaping resistances (over 1.2 Ohm). If you are planning to vape 0.8 Ohms or lower, I would recommend the Subtank over the Triton2...