Use Ikea Knuff magazine files as under sink storage holders. Screw a magazine file holder to the inside of kitchen cupboards. Add space to store more bulky items like chopping boards, cleaning products etc.
There is hardly a better way to utilise every inch of a tall unit than with internal pull-outs. The pull-outs are extremely resilient and glide very smoothly thanks to the innovating pull-out technology of Profi+