What is the right thing to do to cool down a bottle of lemonade faster: put it on ice or put ice on top? Why?

If we put a bottle of lemonade on ice, then the bottom layer of liquid will be cooled first. The upper layers will lower their temperature due to the transfer of heat (cold) due to thermal conductivity and diffusion of molecules.

If we put ice on the top of the bottle, then first of all the lower layer will cool down, which will go down under the action of gravity, displacing warmer layers of liquid up to the layer of ice. In this case, heat exchange will also occur due to the mixing of warm and cold layers. This method will chill the lemonade bottle much faster.