Like some others, at the checkout of a local store the cashier asked me:
Do you need a bag?
As I already had my own, I answered "No, thanks." However, I would like to be a bit more talkative next time, but I don't know with which word to fill in the blank in following sentence:
No, I don't need
bag, thank you!
I don't know if it's a bag, no bag, any bag ...