Beverage holders are designed for internal and external application. The most popular beverage holder TROY sells is the internal dual beverage holder, AC-INBHG. For applications that are equipment intense, you can use an external dual beverage holder. The single beverage holder is available in both the internal and external design. There are custom designs as well that combine a beverage holder with DC power outlets (AC-INTSBH) and with storage (AC-MCBHPKT).
There is a large array to choose from to find the right product for your application.