In the early 1970s skateparks hadn't been invented yet, so skateboarders would flock and skateboard in such urban places as The Escondido reservoir in San Diego, California. Skateboarding magazine would publish the location and Skateboarders made up nicknames for each location such as the Tea Bowl, the Fruit Bowl, Bellagio, the Rabbit Hole, Bird Bath, the Egg Bowl, Upland Pool and the Sewer Slide. Some of the development concepts in the terrain of skateparks were actually taken from the Escondido reservoir. Many companies started to manufacture trucks (axles) specially designed for skateboarding, reached in 1976 by Tracker Trucks. As the equipment became more maneuverable, the decks started to get wider, reaching widths of 10 inches (250 mm) and over, thus giving the skateboarder even more control. A banana board is a skinny, flexible skateboard made of polypropylene with ribs on the underside for structural support. These were very popular during the mid-1970s and were available in a myriad of colors, bright yellow probably being the most memorable, hence the name.