<human>: How would someone go about accomplishing this goal?
To color seltzer water blue.

OPTIONS:
- Open your soda bottle or can and generously stir in drops of red food coloring to create a deep, bright blue hue.
- Open your soda bottle or can and generously stir in drops of blue food coloring to create a deep, bright blue hue.
<bot>: Open your soda bottle or can and generously stir in drops of blue food coloring to create a deep, bright blue hue.