It does say something about the kind of person you are but I'm not sure I would have made a direct comment.
There's one guy in my office and when he's not travelling he brings in a cooler bag. I swear his wife packs everything she packs for their kids' lunches...some kind of snack bar for break-time, sandwiches for lunch, carton of juice, maybe an apple, always a yoghurt and maybe a snack for the afternoon.
I have to admit I find it quite funny to hear him slurp on his juice carton.

I work in the only building here you are allowed to eat at your desk. That said, there are certain things I just wouldn't bring to work to eat.