To make the orange flavored vodka:

Pour the vodka into a clean jar with a tight fitting lid.   Wash the oranges and slice them into 4 to 6 pieces and submerge them in the vodka.  Store in a cool, dark place for 2 weeks, shaking it once a day.

Strain the liquid through a fine mesh sieve or a cheesecloth.  Return the vodka to a jar, and put it back in it’s cool, dark place to age for 3 weeks to mature the flavor.

To make the Orange Liqueur:

Make the simple syrup by combining the sugar and water in a saucepan and heat, stirring, until the sugar dissolves.  Cool completely.

Pour the vodka into a jar, start by adding ¾ cup of the simple syrup and taste.  Add more if you want it sweeter, but it will get sweeter as it ages.  Label it, cover tightly and store in a cook dark place for 6 weeks.