Maybe form follows function for some buildings, but there are a lot of items we use every day that are named for what they do. Here's a list off the top of my head:
bottle/can opener (abrebotellas y abrelatas)
CD player (tocadiscos)
dish washer (lavaplatos)
I hope that was as fun for you as it was for me. I may come back later and add stuff to this list.