Blueberry Banana Overnight Oats

-1/3 cup oats

-1/3 cup Greek yogurt

-1/3 cup soy milk, slightly overflowing

-1/2 banana (1/3 if it's particularly large)

-Scant 1/4 cup blueberries

-Maple syrup, to drizzle

-Granola and/or chopped nuts