Where are you likely to receive mouthwash in a little paper cup?
Options:
- bottle
- drug store
- dentist's office
- doctor office
- bathroom
Step-by-step reasoning process below:

Dentist office is place where teeth are treated. Dentists give mouthwash in small quantity in paper cups to patients to wash their mouth at time of treatment. Dentist office is a place where one can recieve mouthwash. The answer: dentist's office.