At the forefront of the modern modifiers movement is Bittermens. Founded by Avery and Janet Glasser after a bitters making event in 2007, Bittermens has grown to become one of America's largest creators and suppliers of all natural, GMO Free, certified kosher cocktail bitters. In recent years, Bittermens' portfolio has grown to include the Speed Craft line of all natural syrups, a series of bitter liqueurs, and DALA Spirits, their Icelandic-produced trio of New-Nordic Spirits. Joining The Sazerac Company in 2017, Bittermens is still managed by its founders out of its Portland, Oregon offices.