Fill in the blank (_) in the following sentence from the following choices.
Sentence: Rick poured the vodka from a bottle into his flask until the _ was empty.

Choice 1: Rick poured the vodka from a bottle into his flask until the bottle was empty.
Choice 2: Rick poured the vodka from a bottle into his flask until the flask was empty.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
2. The sentence should be "Rick poured the vodka from a bottle into his flask until the flask was empty." The correct