I have a dear friend and co-worker who I like a lot. How do I tell her to buy her own cigarettes?

We both smoke and she definately old enough to purchase her own cigarettes. My feeling is that if you choose to smoke, you should suck it up (no pun intended) and support your own habit. I have been smoking for 30 yrs. and I assume she has too, maybe longer. By nature, I am not a confrontation type of person. Any advice is welcome, except (please) no bashing about smoking. Neither one of us are planning on quitting any time soon and we're both adults, able to read the label on the cigarettes and know the consequences of smoking.