How do you politely reject a kind gesture from someone?

[DenizLikesTennis]

when someone offers you a drink but you don't feel like it, so you have to reject but it'd seem rude. So I thought how do you politely reject the offer?

[Anonymous]

you could say you don’t want to get drunk because you have to drive home. that your stomach is a little weird so you’re going to pass for now. that you just don’t drink at all (if you don’t plan to see the person ever again).

[melanieeeB]

No thank you

[Anonymous]

Just say no thank you, with a smile. :)