Just keep an empty giant cup on your desk and point to it while saying "I already have a coffee, but thank you very much."

Declining politely is easy. YDI.

Accept the first offer & nurse it all day. Then the others will see that you already have coffee & won't offer.

Say no thank you or take a sup then pour it out

You should make a statue out of all the coffee cups you have had and then show them. Not only will they not buy you coffee, but they'll try and buy your work of art from you

damn you are going to need to have a Ehm bowel movement urgently.

just have one in your hand at all times.

haha and it's France so it's all expressos, can't pretend to "nurse" it as it's just 2 sips each.. tell them you're quitting smoking and can´t have coffee for fear of relapse ;)

Am I the only one that has a vision of her running around and talking like Twitchy the squirrel from Hoodwinked?

Trying say No. It doesn't hurt. You can be honest and just say 'if I accept coffee at this rate, I will hit 50 in 5 more cups!' And smile. ?