Innokin T18e Prism Tank The Innokin T18E tank is perfect for mouth to lung Vapers for people who have just switched from smoking to vaping. This is not a Sub-ohm tank but designed to offer the most enjoyable vaping experience possible. It is available in Black, Pink, Silver and Aquamarine. This is the EU version T18E – it will only work with T18E coils and not T18. Just like a precaution for similar Innokin tanks, please remember that you should replace coils every 2 to 3 weeks. Ideally, before the E-Liquid changes, the taste or the device stops producing vapour.