* Water: Water is the most basic solvent. It has the lowest viscosity and fewest dissolved substances, allowing for the most efficient heat transfer from the warmer liquid to the ice.

* Juice: Juices contain sugars and other dissolved substances that increase their viscosity. This slightly hinders the heat transfer process, making the melting a bit slower.

* Soda: Soda has dissolved carbon dioxide gas, sugar, and other flavorings. This results in even higher viscosity compared to water or juice, making the heat transfer process less efficient and slowing down the melting process.

In addition to these factors, other things can affect melting speed:

* Temperature: Warmer liquids will melt ice faster than cooler liquids.

* Stirring: Stirring the liquid helps distribute heat more evenly and will speed up melting.

* Surface area: Ice cubes with larger surface areas will melt faster than smaller ones.

Let me know if you'd like to explore any of these factors in more detail!