Here, we investigated the influence of the loading of three different but structurally similar ABA triblock copolymers with the model compound curcumin on the morphology of the resulting micelles. While without CUR no pronounced core shell character was found, addition of small amounts of CUR enhanced the contrast between core and corona. In all cases, CUR concentrated in the core at low drug loadings. With increasing CUR concentrations, the picture becomes more complicated and the scattering data could not be reasonably fitted using the previously employed core-shell model. Our data suggests a core-shell-shell morphology, with parts of the hydrophilic corona filling up with CUR and effectively forming a second, inner shell, while the other shell remains hydrated and colloidally stabilizes the micelles. With more CUR added, this situation eventually becomes unstable, finally causing precipitation. This happens already at about 25 wt.% drug loading for the A-pBuOx-A micelles, while those with poly(2-oxazine) based B block allow overall drug loading of 50 wt.%. The insufficient difference in scattering length density between the hydrophilic and hydrophobic block of the studied block copolymers made hampered a more detailed analysis of the presently investigated systems. However, to overcome this limitation will require block copolymer, in which the different blocks are deuterium labeled.