I've been using a backpack, but I want to get a bag for my bike. Most of the time, I'm only carrying my lunch, one or two compressible items of clothing (pants or skirt, sometimes a windbreaker), and wallet/keys/cellphone. I like being able to stop at farm stores or the grocery store without going home first, but there's not much room left in my backpack for food.

I can't decide whether a rack trunk or panniers would be a better choice - it seems like a waste to use panniers when they'd be mostly empty, but I'd like enough space to do a little grocery shopping.

LBS hasn't been much help - the guy there told me "Why don't you just strap an orange crate to your rack? That will carry anything you need."

But, I found this online: http://inertiadesigns.com/catalog/pr...roducts_id=171

Has anyone seen or tried these? Any other recommendations?

Thanks!