Mighty Buggy Hook
The buggy hook is ideal for one handle across strollers. It’s easy to drape things when there are 2 handles, but 1 bar across handles make it difficult. I used to drape my bag over the handle (my stroller is 1 bar across), except depending on the bag it wouldn’t fit or it would slip off. These hooks are really sturdy and in addition to holding a diaper bag can hold a Nalgene water bottle or a jacket.