The Innokin Zenith tank is being reviewed as a hassle-free option for mouth-to-lung (MTL) vaping. It is part of a series of products from Innokin, which also includes the Zlide tank and various kits such as the Coolfire Z60 and Z80. Reviews of these products are being published by various outlets, with some comparing the Zenith to other tanks and kits in the series.