Offering

Informal

Cigarette?

Would you like some coffee?

How about a glass of water?

Here. Have a/some . . .

Would you like one of these?

Can I get you something?

What can I get you something to drink?
No thank you

Yes, please.

Sure. Thanks.

Okay. Thanks.

I really shouldn't.

No. Thanks anyway.

Juice would be fine.

Formal

Would you care for some . . .

Would you like to try . . .

Let me offer you . . .

Let me get you a/some . .