A tall cabinet fitted with fixed shelves and the same cabinet fitted with a pull-out pantry system hold roughly the same volume — but they don't function the same way at all.
The volume is similar, the access isn't
Fixed shelving in a full-height cabinet technically holds a comparable amount to a pull-out pantry unit. The difference shows up the moment you need something from the back of the third shelf up — with fixed shelves, that means removing items in front to get to it.
What a 12-basket pull-out changes
SATORI's Glass Pantry Unit splits that same cabinet volume into 12 tempered-glass baskets on a top-mounted, ball-bearing soft-close mechanism, rated to 60kg total. Every basket comes fully out of the cabinet, so nothing is ever blocked by something in front of it.
Visibility reduces waste
Glass baskets mean contents are visible without opening a container or pulling a shelf forward, which in practice reduces the amount of packaged food that gets pushed to the back and forgotten until it expires.
Sizing it correctly
The Pantry Unit is available in 450mm and 600mm widths and adjusts to 1800mm or 2100mm cabinet heights, with a depth requirement of roughly 530mm — worth confirming against your cabinet plan before the carcass is built, since it's a suspended top-mounted system.