Why are newspapers, but not soft drinks, sold in vending machines that allow customers to take more than they paid for?

The answer is really logic, if there would be instead of newspapers- soft drinks, after small period of time, the vending machine would be empty. If you buy a newspaper you want just one, you don’t need another. There is no reason why somebody take more than one, but when is concerned with drink is different. Soft drink is more expensive, so if there is any possibility to take not one, but 3, 4 or more, why not? That something witch is important for as, our health, what we have to buy, the opposite is with newspaper, it’s just a “want”, you can live without it.
To sum up, we can say that drinks in vending machines is uneconomic for company.