Abstract: Some aspects provide a chamber to hold a fluid, the chamber including an evaporation surface and a condensation wall having a condensation surface, and a heat dissipator coupled to the condensation wall. The evaporation surface is to evaporate the fluid and the condensation surface is to condense the evaporated fluid in a case that the apparatus is in a first orientation and in a case that the apparatus is in a second orientation that is rotated substantially ninety degrees from the first orientation around an axis that does not intersect the evaporation surface. In some aspects, the evaporation surface comprises structures to facilitate boiling nucleation.