This site contains over 400 different types of classic soda machines. You can browse through them by choosing manufacturers. Then choose the small five cent image and you can see the pictures of soda machines.
Different manufacturers made very different vending machines. It was really neat to go through and see all the different types from when they were first originated to more modern ones like we see every day. The vintage ones I think are by far the neatest. It was also neat to take a tour back in history because this gives you a good idea of how things were kept cool based on the era.
Check it out!