A container for quiescently holding a biologic fluid sample for analysis, said container comprising: a chamber (12;62) having a first wall and a transparent second wall, and a through-plane thickness (t) defined as the shortest distance between the interior surface of said first wall and the interior surface of said second wall, wherein a fluid sample quiescently residing within said chamber (12;62) is iimageable through said second wall; a plurality of reagents (54;64;66), each reagent (54;64;66) operable to enable the analysis of the biologic fluid, wherein said reagents (54;64;66) are each positioned within said chamber (12;62) at a known spatial location; and a label attached to said container, said label containing information having utility in said analysis, said information including said known spatial locations; characterised in that: the relative size of said through-plane thickness (t) at each said known spatial location of each reagent versus the lateral spacing between the locations of the different reagents is such that the reagents (54;64;66) will diffuse within the quiescent fluid sample, and reach equilibrium across the through-plane thickness (t), and for a period of time thereafter sufficient to perform the analysis, lateral diffusion of each reagent (54;64;66), has negligible or no effect on the analysis using any of the other reagents (54;64;66). a chamber (12;62) having a first wall and a transparent second wall, and a through-plane thickness (t) defined as the shortest distance between the interior surface of said first wall and the interior surface of said second wall, wherein a fluid sample quiescently residing within said chamber (12;62) is iimageable through said second wall; a plurality of reagents (54;64;66), each reagent (54;64;66) operable to enable the analysis of the biologic fluid, wherein said reagents (54;64;66) are each positioned within said chamber (12;62) at a known spatial location; and a label attached to said container, said label containing information having utility in said analysis, said information including said known spatial locations; characterised in that: the relative size of said through-plane thickness (t) at each said known spatial location of each reagent versus the lateral spacing between the locations of the different reagents is such that the reagents (54;64;66) will diffuse within the quiescent fluid sample, and reach equilibrium across the through-plane thickness (t), and for a period of time thereafter sufficient to perform the analysis, lateral diffusion of each reagent (54;64;66), has negligible or no effect on the analysis using any of the other reagents (54;64;66). the relative size of said through-plane thickness (t) at each said known spatial location of each reagent versus the lateral spacing between the locations of the different reagents is such that the reagents (54;64;66) will diffuse within the quiescent fluid sample, and reach equilibrium across the through-plane thickness (t), and for a period of time thereafter sufficient to perform the analysis, lateral diffusion of each reagent (54;64;66), has negligible or no effect on the analysis using any of the other reagents (54;64;66).