Ice cubes in cola could be classified as
Heterogeneous mixture
A heterogeneous mixture is simply any mixture that is not uniform in composition. It's a non-uniform mixture of smaller constituent parts. The composition varies from one region to another, with at least two phases that remain separate from each other, with clearly identifiable properties. Using various means, the parts in the mixture can be separated from one another.
Here, it is heterogeneous as we can see that the ice and the soda are two distinct phases of matter (solid and liquid).