How much bad behaviour do you accept from a friend?

Tweet

I have a friend who has a habit that is rather annoying. If something she regularly uses is discontinued, then she'll spend a lot of time trying to find it anyway. I'm talking about stuff like a certain brand of shampoo, a shade of lipstick....well you get my point. Now of course it's her business if she wants to make such a big deal of it. What I find highly irritating is that I'm the one that gets schlepped into every single drugstore when we go out. And it's not like I didn't ask her beforehand if there is something special she wants to go out for. Then she usually says that there isn't. But on the day itself it's in one store and out the next. I don't mind that but I do mind having to wait while she aimlessly stares at bottles of shampoo for five minutes at a time (even though they are arranged by brand). Now this isn't happening when something just got discontinued. I mean she'll actually be "searching" for that elusive shampoo for years. I usually thought it was a bit sad that she just wouldn't let go. This year I finally plucked up the courage to tell her that if she wanted/needed to buy shampoo that she'd have to do it on her own time because I was absolutely fed up with it. It doesn't take 5 minutes to "spot" that it isn't there. And that I did love her to bits but I really would not stand for it anylonger. She said she would try to be more considerate. Has something similar ever happened to you? Did you say something right away or did you keep quiet hoping it would be a one-off?