I have basic knowledge of chemistry and how it all works (will be taking the class next year) but I understand density and mass. Since the hotter a liquid, in this case, the molecules are more everywhere and not contained so to say. In a way, a $\ce{200 cm^3}$ cup will hold less water if say brought up to a temp of 90°C (194°F) and will hold more water if brought to a temp of 2°C(35.6°F) due to the molecules being more contained and not bouncing everywhere. Does this make sense or did I underestimate my understanding of this whole thing?
*I am talking about mass not volume.