They are so small, so that you just pass through the items into your shopping cart. Basically you don't have much of an option. If you shop without a shopping cart (like me buying just a few things that fit into my bagpack) the cassier might suggest that I take a cart next time.

Then there is this side-board across the checkout that you can use to bag your purchase.

What you also see a lot in Germany is people taking empty cardboard boxes from the shelves and use them instead of bags at the checkout. It is quick and convenient.

Then my marketing book lied to me.