The great thing about having a custom designed walk-in pantry is that you can decide exactly how you want it constructed. The height of the shelves for example; You may want to be able to adjust the shelf heights yourself to optimize the storage space.
Baskets in your walk-in pantry would also be something you could consider as everything in your pantry won’t sit easily on a shelf. Bulky items such as potatoes for example.
Also, you can decide whether or not you need a wine rack. If you do then you can consider how much wine storage you might need.
Optimizing the storage space in your pantry can make such a help to your life.