Wish me luck - I'm going to HR when I get into work tomorrow about a man who works for the same Company, but I don't know him and never had a conversation with him. The other day in the office, I was in the open-plan kitchen which is a bit of a thoroughfare and I was pouring myself a glass of iced coffee from a container I bought in from home. Minding my own business and he pipes up, as he's walking past "you shouldn't be drinking that - you should be drinking green tea".. FFS mate, didn't ask for, and don't care about, your opinion! 
I know this topic has been mentioned before, where random men think it's ok to comment on what women are eating/drinking/wearing/etc etc etc. No, it's not.
I've had to scroll through the staff list photos to work out who he is, but it was so fleeting, that I'm going on the hunt tomorrow to ensure it's who I think it is. If it's this dickhead, he's old enough to know better than to speak to women like that - and we work in the public sector and this stuff is drummed into us all the time.
He picked the wrong person to insult - and I'm waiting for the excuses - - - you took it the wrong way - - - you don't have a sense of humour - - - I didn't mean anything by it - - - and yeah, none of them is going to cut it with me. He insulted me and there's no changing it with pissy excuses.
So, I suppose I'm not really asking if I'm being unreasonable..