Note 1: For a slightly less sweet version, combine the sweetened condensed milk with half and half before adding it to the cup. Usually we'll mix about 1/2 sweetened condensed milk - 1/2 half and half.
Note 2: For a hot version, just omit the ice at the end of the recipe. In Vietnam the hot version will often be served in a cup of hot water to help keep it warm longer.
Note 3: For a quick version, replace the Vietnamese style brewed coffee with a 2 ounce shot of espresso.