I use pvc pipe in 50mm size (about 2 inch)
and a narrow/tall bookshelf.
It was easy to buy the pvc pipe and add to it as needed. If you have access to vinyl fence rail, cut into short lengths that also makes an excellent add-on-able storage system (it's not readily available in Australia).
I think I started with about 30 'holes'. I bought in 1/4 lbs and only bought larger quantities as I learned what I used most.
After 9 years I still only have 3 shelves in the bookshelf filled with 1/4 lbs, and some larger quantities in a wine bottle shelf. Nothing fancy.
I probably have 100 'holes' all up.
I'd rather spend the money on glass than fancy storage.
