My Grandfather's Ceramic Beer Bottles

My grandfather worked on ships in a shipyard near Benecia, California for most of his adult life, starting out as a teen. When he was young (in the 1920s) he liked to dive, finding many interesting artifacts. When he passed an old man in 1980 he had given many items to me. Among those treasures were these beer bottles, he believed they were from the 1800's. They are unmarked but obviously very old.