Most of the residential areas at Chakokot possess one or more bottle-shaped underground storage chambers, known as "chultunob", with 14 having been found as of 2001. Because of the thick vegetation at the site, investigators consider that there are probably more to be found. These "chultunob" were closed with disc-shaped stone lids, many of which were found either still in place or close to the aperture of the "chultun" to which it belonged. The stone lids were without perforations so it is supposed that the chambers were used to store dry goods rather than water.