Sliding shelves in cabinets.... I want them, but don't have them yet.
Someday.... lol
I did this for DD's kitchen in Ireland.
Save large cardboard boxes, cut down to height that works for you, and put slippery freezer paper on bottom so it can slide in & out for you, but only good for light weight plastic ware, and dry goods.
those fancy sliding shelves...you can buy the hardware separate and then just shop for the drawer mechanism at junk stores and yard sales.