This is the ULTIMATE AKC Scent Kit!! It includes everything you would possibly need to have lots of fun doing scent work with your dog. There are 6 different kinds of hide containers, along with a hemostat and all 4 Essential Oils: Sweet Birch (Betula Lenta), Aniseed (Pimpinella Anisum), Clove Bud (Eugenia Caryophylatta) and Cypress (Cupressus Sempevirens).. You can also add Pick 'n Pluck foam to your case to keep everything in it's place.