I mean how long does a loaf of sliced bread actually last? 20 slices, give or take? two people making lunch sandwiches, that's five days per loaf. there's usually enough oil and preservatives to last a couple of weeks. (if you're wanting to bake your own sandwich bread, I highly recommend adding a some olive oil to the dough. it helps it last longer and helps produce a tighter crumb.)

I only really had a problem with sliced bread going stale when I lived alone.