When the question is paper or plastic, say Metro. Our bungee suspension, single sided folding basket pannier comes with a shoulder strap so you can pop it off the bike and carry it into the store. It is designed to fit a standard paper grocery bag, but you can just fill it up without one. The Metro is also excellent for commuting to work, with plenty of space for extra clothes and files. Unlike other basket panniers, the Metro folds in on itself, when not in use not up and in the way of your rack as do designs with U shaped supports. Also unique to the Metro are the adjustable top hooks, allowing riders to perfectly adjust the position of the bag on the rack for a more stable ride and to prevent heel rubbing.