If you look closely, you can see it is clearly a plastic one - he has done this a few times now, so there are opportunities to see what he is doing, and the broadcasting authorities would not allow transmission of a 'real' one.
I only started watching Celeb Juice recently when I happened to leave the channel on while I was doing something else. Can't believe I never realised how hilarious is was before. The look of permanent disgust on Holly and Ferns faces just add to it.
Evian, you have missed the earlier series when Keith's teasing of Fern was utterly merciless, focusing entirely on her nose ("massive nostrils!) and her boobs ("boy tits!) - he has toned it down now, but she always took it all with endless patience.