Keep a variety of them at home, because there's a wide range of personal choices and needs involved. Amen to the 'unscented' and 'wings' comments, too.

Now, from the trenches as t'were: keep a couple of regular tampons and a pad in **your** purse. Yahh, you won't be needing them yourself, but, but..... I have lost count of the number of times that some poor girl in the next loo cubicle over has voiced the plaintive hope that somebody, anybody, within earshot, might happen to be carrying a spare. Trust me, tampon dispensers **do** run empty. :/