Objective: To fill up a water bottle,

Which of the following solutions is more sound in terms of naive physics reasoning?

pick from the following.
(a). unscrew the lid of the bottle, place under the faucet, and turn on the water. Once the water has filled the bottle, turn off the faucet and screw the lid back on.;
(b). unscrew the lid of the bottle, place under the faucet, and turn off the water. Once the water has filled the bottle, turn off the faucet and screw the lid back on.;
(a).