  Liquid drops are everywhere around us and important in numerous technological
applications. Here, we demonstrate a quasi-two-dimensional (Q2D) analogy to the
regular, often close to axisymmetric, three-dimensional (3D) drops. The Q2D
drops are created by confining liquids between vertical walls, leading to
formation of low aspect ratio capillary bridges that are deformed by gravity.
When stationary, the Q2D drops adopt projected shapes that are analogous to 3D
sessile drops, ranging from circular drops to puddles. When moving, the Q2D
drops exhibit capillary and fluid mechanical behaviours analogous to 3D drops,
including impacts and sliding on pseudo-surfaces. The Q2D drops also exhibit
considerably more complex phenomena such as levitation, instabilities and
pattern formation when subjected to external electric, magnetic and flow fields
-- all seen also in regular 3D drops. The presented 3D-Q2D analogy suggests
that the diverse and often complicated phenomena observed in 3D drops can be
studied in the Q2D geometry, allowing also new physics arising from the reduced
dimensionality and the new boundary conditions.
