I used to be in a management role a number of years back and faced this same issue.
Thankfully I was able to convince executive management that for our several hundred employee company, running a Coke soda machine was basically the cost of 1 Tech Support headcount.
That's it.
One of the most popular in-office perks, the Coke freestyle machine was 1 tech support headcount.
That was years ago. And we still have that machine.