Fire King Ranger Mug, Orange, Set of 2 Handle Mugs. Officially called the Ranger Mug, it's also known as the "Barrel Mug" due to its barrel-like shape. It has one of the largest capacities among Fire King mugs. Fire King Rib Bottom Mug, especially the yellow ones. Brand: Fire King is a heat-resistant glass brand manufactured by Anchor Hocking from 1941 to 1986. Design: Rib Bottom refers to the design with ribs (grooves) on the bottom of the mug. It's also characterized by its stackable shape. Please understand that these are vintage items.