Method for handling a fluid, comprising: providing a fluid handling device comprising: micro fluidic structures comprising at least one inlet chamber (20, 50), one outlet chamber (22, 52), and a connecting duct (24, 54) which fluidically connects the inlet chamber (20, 50) to the outlet chamber (22, 52), wherein in an initial state, the inlet chamber (20, 50) is completely filled with at least a liquid or partly filled with at least a liquid and partly filled with a compressible medium, and the outlet chamber (22, 52) is at least partly filled with the compressible medium, wherein one of the inlet chamber (20, 50) and the outlet chamber (22, 52) comprises such a venting duct (26, 28, 56, 58) that a first flow resistance/volume product of venting of said chamber for the compressible medium amounts to at least 6700 N ⋅ s m 2, the other of the inlet chamber (20, 50) and of the outlet chamber (22, 52) being vented, and a second flow resistance/volume product, the first flow resistance/volume product being larger than the second flow resistance/volume product by a factor of at least four, an actuation means for actuating the micro fluidic structures on the basis of the initial state, wherein the respective flow resistance/volume product is defined by the product resulting from the volume of the respective chamber and a fluidic resistance R fl of the respective venting duct (26, 28, 56, 58), comprising R fl = C geometry ⋅ ηl A 2 wherein C geometry is a geometry-dependent factor, η is the viscosity of the compressible medium, I is the length of the respective venting duct (26, 28, 56, 58), and A is the cross sectional area of the respective venting duct (26, 28, 56, 58); and on the basis of the initial state, actuating the micro fluid structures by causing a change in temperature or by causing mechanical compression or decompression of the compressible medium so as to cause, due to different pressure equalization rates of the inlet chamber (20, 50) and of the outlet chamber (22, 52), a pressure difference of at least 30 Pa between the compressible medium within the inlet chamber (20, 50) and the compressible medium within the outlet chamber (22, 52) so as to thereby switch the valve device implemented into the connecting duct, such that liquid gets from the inlet chamber (20, 50) into the outlet chamber (22, 52), or so as to thus temporarily counteract the flow, caused by the actuation, from the inlet chamber (20, 50) into the outlet chamber (22, 52). micro fluidic structures comprising at least one inlet chamber (20, 50), one outlet chamber (22, 52), and a connecting duct (24, 54) which fluidically connects the inlet chamber (20, 50) to the outlet chamber (22, 52), wherein in an initial state, the inlet chamber (20, 50) is completely filled with at least a liquid or partly filled with at least a liquid and partly filled with a compressible medium, and the outlet chamber (22, 52) is at least partly filled with the compressible medium, wherein one of the inlet chamber (20, 50) and the outlet chamber (22, 52) comprises such a venting duct (26, 28, 56, 58) that a first flow resistance/volume product of venting of said chamber for the compressible medium amounts to at least 6700 N ⋅ s m 2, the other of the inlet chamber (20, 50) and of the outlet chamber (22, 52) being vented, and a second flow resistance/volume product, the first flow resistance/volume product being larger than the second flow resistance/volume product by a factor of at least four, an actuation means for actuating the micro fluidic structures on the basis of the initial state, wherein the respective flow resistance/volume product is defined by the product resulting from the volume of the respective chamber and a fluidic resistance R fl of the respective venting duct (26, 28, 56, 58), comprising R fl = C geometry ⋅ ηl A 2 wherein C geometry is a geometry-dependent factor, η is the viscosity of the compressible medium, I is the length of the respective venting duct (26, 28, 56, 58), and A is the cross sectional area of the respective venting duct (26, 28, 56, 58); and on the basis of the initial state, actuating the micro fluid structures by causing a change in temperature or by causing mechanical compression or decompression of the compressible medium so as to cause, due to different pressure equalization rates of the inlet chamber (20, 50) and of the outlet chamber (22, 52), a pressure difference of at least 30 Pa between the compressible medium within the inlet chamber (20, 50) and the compressible medium within the outlet chamber (22, 52) so as to thereby switch the valve device implemented into the connecting duct, such that liquid gets from the inlet chamber (20, 50) into the outlet chamber (22, 52), or so as to thus temporarily counteract the flow, caused by the actuation, from the inlet chamber (20, 50) into the outlet chamber (22, 52).