Glass Act specializes in manufacturing the Butler Mug Holding System, a patented design developed in the early 90s for motorcycles and expanded to include applications for ATVs, boats, and other power sports. The Butler system includes various bracketing options to mount cup holders securely on different vehicles. They offer a range of products such as Butler Driver Sets, Passenger Sets, ATV Sets, and Universal Sets, along with parts and accessories for customization. Glass Act's Butler Mug Holding System is praised for its durability, convenience, and ability to keep beverages hot or cold for extended periods, making it a popular choice among motorcycle riders and other vehicle enthusiasts.