I make the ziplock bag ice cream and pour that in a cup. I just use a spoon to stir it in the cup and then drink it.

Some carb countdown milk would work fine.

Last time I used 1tsp vanilla extract made with glycerine. 1tsp unsweetened cocoa and just spilled in some DaVincis English Toffee Syrup to taste (just happened to be the first one I grabbed)

it came out really great!

I am sure you can add some carb countdown milk to it if you want more though it would make it a bit runnier than I like it. The carb countdown chocolate milk might go great if you are trying to make a chocolate shake. Just shake the cream in the bag a bit longer so it gets harder.