You should do the experiment yourself! It will be fun. It depends on what the sugar and carbon dioxide in the soda does to its heat capacity, which I don't know. You know with which soda you are doing this experiment.

You will need the soda, the milk, cups for each of them, ice, and a clock. Try to do it yourself or ask a grown up to help you

If you do not find any help, please get in touch with us again, and we will try to guide you on this experiment.