Boro tanks first appeared in the Billet Box mod, an American-made AIO device that gained a cult following since its 2012 release. The idea of combining a tank and mod into one system has since become mainstream. While most Boro tanks are designed for rebuildables, some use stock sub-ohm coils for a simpler setup.
RBAs (Rebuildable Atomisers) form the rebuildable section of an AIO, much like RDAs and RTAs. Most RBA decks are single-coil, though mesh coil options are available. A Boro tank on its own is an empty e-liquid reservoir, but when paired with an RBA deck, it becomes a customisable rebuildable system. While many Boro tanks come with matching RBA sections, others are designed to be compatible with a variety of AIO devices.