Stinson Studios Charred Oak Tumbler Gift SetThese handmade white oak tumblers are flame toasted on the inside. This process heat seals the wood grain and makes your spirit come alive. Replicating the slightly smokey, oak cask aging conditions of your favorite scotch, whiskey, tequila, vodka, rye or bourbon, these white oak cups are very durable and feel great in the hand. set of two tumblers in oak crate hand wash and dry, do not let liquids sit in them overnight holds 4 oz handmade in Canada