To save energy with my old fridge I have water bottles in it for cold mass and have the power on a timer so it shuts off a few hours at night. To save on replacing it, I just repainted it. It was white and rusted. I sanded and painted it in this home-made chalkboard paint. We can write on it in chalk and then erase with a slightly damp sponge.
My wife and daughter love it too. It's like having a new fridge.