The American Atlas: Map 2, Pacific Ocean detail showing "New Albion"

This mug features part of Map 2 - Pacific Ocean, specifically an area known as "New Albion" which was visited by Sir Francis Drake on this circumnavigation of the globe (1577 - 1580) in the Golden Hind: 

The next episode of the circumnavigation was the discovery of the coast of Upper California, which was named New Albion. "Albion" was the classical name for England, so called from the white ("alba") cliffs of Dover. After stopping at Huatulco in Central America for two days, Drake sailed northwards, perhaps as far as Vancouver Island, probably searching for the elusive Northwest Passage. If so, he quickly gave up the quest and went south again to the vicinity of San Francisco Bay, where he remained for over a month (June-July, 1579), overhauling his ship and making friendly contact with the Indians.

from Sir Francis Drake: A Pictorial Biography by Hans P. Kraus, Library of Congress