Other common names include 'boab', 'boaboa', 'bottle tree', 'the tree of life', 'upside-down tree', and 'monkey bread tree'. The trees reach heights of 5 to 30 meters (16 to 98 ft) and trunk diameters of 7 to 11 meters (23 to 36 ft.). Its trunk can hold up to 120,000 liters of water. For most of the year, the tree is leafless, and looks very much like it has its roots sticking up in the air.