Casta Weber Azul is 100% Blue Agave Tequila that is aged in white oak casks and is amazingly smooth. Similar to the way great cognacs are created, Casta Weber Azul has a special formulation that combines the finest aged tequilas (from 1 year to 5 years old). Fortune Magazine and Market Watch both ranked it high at the top ? authenticating just how good it really is. Each bottle is made from hand blown glass and thus is a unique, collectable piece of art that is also hand numbered and signed. One bottle requires twelve of our most experienced craftsman and twenty minutes of skilled artistic work to produce. Afterwards each piece is tested to validate the correct liquid volume.