Refrigerator plastic on shelves
For the top of my refrigerator I bought a length of heavy plastic meant for a floor, but narrow like a runner. It is easy to take down and wash off in the sink. I don't know why that couldn't be used for the shelves too.
the plastic sheet will cut down maintenance as in cleaning the shelves...
Firm plastic (1/8") cut into shelf sizes should work. A thin wall around the edges will minimize spills from dripping down.
Amazon has plastic shelving.
Jan...You can just cut shelf padding to the proper size.
You could just use some padded foam placemats.