Here's the answer:
“要不要喝点儿?”
(yào bù yào hē diǎn'r?)
Watch a real native speaker say it:
Here's how it sounds in a textbook:
You could also say:
- nǐ yào bú yào hē diǎn'r?
Fun fact: the hundreds of thousands of people learning Chinese with Memrise get this phrase correct 97.01% of the time!