I used to do my shopping on my hybrid bike with Ortlieb bike shopper panniers, still got the set up and looking forward to starting up again. I've never ridden a foldable bike but tempted to get one, though not really for shopping more commute. I recomment keeping your bike locked up well with two different types of lock. i've caught two thieves taking a look at my bike but then walking away with a third what look like an attempt at my lock but just dented the rubber on the d lock. so i was lucky so i'm getting additonal locks this time around.