The present invention is directed to a stackable container system. The stackable container system can comprise a beverage container, a beverage container lid, a plurality of smaller containers, and a plurality of smaller container lids. The smaller containers and smaller container lids are configured to allow any of the smaller container lids to be used on any of the smaller containers. The bottom of the beverage container and the bottom of each smaller container is also configured to allow the beverage container or smaller container to be interlocked with the top of any of the smaller container lids. In addition to storing beverage ingredients, the stackable container system can also be used to store other edible and inedible ingredients.