Yes you can if you own the machine. You should ask the people where the machine is located what they would like to see in the machine as they are your customers. Many times operators of vending machines say well its says pepsi or coke on the front, do I have to put coke or pepsi in the vending machine? Depends on if you own the machine or is it cokes or pepsi’s vending machine? If you got the machine from a bottler company then you must put their products in that machine. Coke vending machines and pepsi vending machines are property of the bottling companies and their respected trade marks and product rights are territory driven. Problem with getting the bottlers to let you use a vending machine is they dictate the products and prices you have to sell at as well as they have buy requirements that you must fill also. I say own you own machines as you can do as you like..