These clear acrylic coasters feature an iconic 'blood spatter' and have rubberized feet to protect your table. Each coaster is also imprinted with the Dexter logo in red. The storage box has the Dexter logo carved on top and the Showtime logo carved on two sides.
You won't want to hide these out of sight, much less store these behind your air conditioner.
For $34.95 they're aren't ridiculous expensive, but unfortunately that's still out of my price range. (Maybe there's a way to do a DIY version.) You can find them here if you're interested though.