In the US, I've worked at several places where I've gotten strange looks for bringing in lunch. Don't know why exactly, I can take ~15 minutes in the morning an

In the US, I've worked at several places where I've gotten strange looks for bringing in lunch. Don't know why exactly, I can take ~15 minutes in the morning and pack something better than most lunch places serve. I would understand if I was bringing in garlicky curry or something similar that causes the break room to smell, but I normally bring in a sandwich. I think part of this might be that it looks 'cheap'.