Packed lunch for highschool?

This year will be my first year of highschool, I love to shop so I don't want to sped all my money on lunch, and I don't want to eat the nasty school lunch, besides saving money, I want to take a packed lunch to eat healthy and eat want I'm in the mood for that day. Would it be dumb if I had a lunch bag (a stylish one like vera bradley or something) would it make me look like I should be in elementary school? thanks :)