A friend of mine recently came across 15 corny kegs that some restaurant was just throwing away. He took them and gave me three of them. When I got them, they all had some sort of soda in them. They all had a lot of pressure on them, so they aren't leaking. I drained the pressure and opened them up to find Coke and Dr. Pepper in them. I cleaned them all out and they look great on the inside. Is there any difference between a soda keg and a beer keg? They each have two nipples on them. I plan to use them in a kegerator. Anything special I need to do? They are each 22.5" tall and 9" in diameter. Those are the sizes that people use in a mini fridge, right?