Colorant Container

A container suitable for holding a fluid includes a body defining an interior volume and having a torso portion having a substantially square-shaped cross section, a shoulder portion joined above the torso portion and including a plurality of shoulder walls that define a substantially square cross-section, and a base portion, which may have a substantially square or octagonal cross section. The container body may be formed with indentations at each of its four bottom corners that are shaped to give the container relief from detrimental piercing contact with the lugs that are provided in the bottom of some square retention buckets used on commercial paint shakers. The body may be made substantially or entirely of polyethylene terephthalate. The container is particularly suited for colorants and pigment dispersions for tinting coatings and for shaking colorants and pigment dispersions prior to dispensing into a tinting machine.