Normally I'd just say "aquarium cars", but I've had a ton of fun with this older MTH depressed center flatbed I picked up at an antique store last October, it came with some little Halloween bobbleheads since the previous owner used it in their Halloween train so it's got a bit of glue residue on it, but that has not stopped me from loading it with whatever I've wanted. I've kept the previous owner's tradition of outfitting it with whimsical cargo alive as this car is one of my dedicated "Transformer" carriers, and by Transformers I mean the alien robots that turn into cars, or Dinosaurs in this case...