Super Easy Patriotic 4th of July Layered Jello

Bahan-bahan (8 porsi)

• 3 ounces red Jell-O (1 box)
• 3 ounces blue Jell-O (1 box)
• 1 (0.25 ounce package) unflavored gelatin
• 1 can sweetened condensed milk
• 1 cup vodka (optional, if making "Vodka Jello")
• whipped cream (and silver balls for decorating if desired)