A miniature flow-through cuvette for spectrophotometric measurement of a liquid sample includes a cuvette body of a transparent material including a first outer surface and an opposing second outer surface, and a flow channel disposed through the cuvette body. The flow channel includes first and second interface segments generally vertically oriented, each having an open exit; a measurement segment interconnecting the first and second interface segments; a first inclined planar inner surface disposed in a turning segment between the first interface segment and the measurement segment, facing the first outer surface; and a second inclined planar inner surface disposed in a turning segment between the second interface segment and the measurement segment, facing the second outer surface. The first and second inclined inner surfaces terminate the measurement segment at opposing ends thereof. Further provided is a spectrophotometer including the miniature flow-through cuvette.