BRILLIANT!! 10 Simple DIY Fridge Mats - Fridge Coasters are mats that line the shelves in your fridge. So, when you have a spill, instead of cleaning the entire fridge, just remove the coaster and wash it. I found this simple and inexpensive idea from It’s An Organized Chaos blog. She takes flexible plastic placemats and cuts them to size, then lines her fridge shelves with them. How easy is that?! Purchase an extra mat in case I mess one up.