The Bottomless Coffee Mug of Silicon Valley is alleged to be a mug that will never run out of coffee once full and always remain at the optimal temperature for drinking. It was said to be the secret to the endless energy of Silicon Valley entrepreneurs during the 1990s and 2000s. The Bottomless Coffee Mug of Silicon Valley was rumored to be used by some of the most prominent CEOs in the Silicon Valley, but as of 2012 its location remains unknown. Coffee mugs are generally made of ceramic materials and have the capacity to hold 12 ounces of liquid. Typically designs are applied to mugs for decorative or advertising purposes, but it is unknown if the Bottomless Coffee Mug of Silicon Valley has any designs. The coffee rumored to be used most frequently in the Bottomless Coffee Mug of Silicon Valley is a light roast of Brazilian origin. Though its current whereabouts are unknown, the future owner of this magical artifact would have an endless supply of caffeine at his or her hand, making late night computer programming sessions all the more easy.