Using this vending machine is simple. Just insert a 25¢ coin, 50¢ coin, or a token into the coin slot. Then press the button to get your napkin or tampon. The product will drop into the easy - access tray. When loading products, you don't have to worry about any weights. Just open the two tumbler door locks with the key that's the same as other Bobrick accessories and put the tampons or napkins inside. Keep in mind that the machine has a capacity of 30 tampons and 20 napkins, so check and refill it regularly. To maintain it, clean the Type 304 satin - finish stainless steel exposed surfaces with a mild cleaner. Avoid using abrasive materials that could scratch the surface.