Heat water and sugar in a pot until the sugar has dissolved and the water is clear.

In a blender, mix the two cans of milk, egg yolks and vanilla until thoroughly mixed.

When the syrup is ready, pour the egg mix into the pot and stir continuously over med-low heat.

After a minute, pour in the rum - as much as you want - the more the better, and remove from heat.

When the nog has cooled down, transfer to an empty bottle and refrigerate several hours or overnight.

I always sprinkle just a pinch of cinnamon and nutmeg into mine for an extra flavor kick.