Combine sweetened condensed milk and Half & Half in a large batter bowl with a lip for pouring and whisk well to combine.
In one bottle or jar, add 1 tsp rum extract and 1/2 tsp ground nutmeg.
In the next bottle scrape the insides of one vanilla bean into it and add 1/2 tsp vanilla extract.
In the third bottle add tbsps cocoa powder and 1/2 tsp peppermint extract.
In the fourth bottle add 1 tbsp cinnamon, 1 tsp vanilla extract and 1 tsp almond extract.
Divide cream mixture between four bottles, cap tightly and shake well. Label and refrigerate for up to two weeks.
Note: If the Cocoa won't mix well you may have to pour into a blender before putting back in the milk bottle.