Measuring & pouring

These problems use conservation: the total amount of liquid never changes, and when liquids mix they spread evenly through the combined volume. Track each liquid separately. If a container holds $V$ total liquid and $x$ of it is wine, then any poured-out amount $p$ removes wine in the fraction $x/V$, leaving $x(1-p/V)$. The same rule applies to water. After every pour, recompute the amount of each liquid in every vessel. No liquid is created or destroyed, and no trick tilting or waste is allowed.