A bit of lumber and some inexpensive hardware can turn that gap into a pull-out pantry ... and below the cabinet in addition to a couple of wheels? This would help keep the pantry from scraping ...

Outfit them with pull-out drawers, shelves, and organizers. However, if you’re not sure where to find these storage solutions ...

Install pull-out shelves to maximize lost space in deep cabinets. You can use drawer dividers to organize pantry items on the ...