Abstract: A hot tub assembly and associated methods for adding desirable features to portable hot tub systems. The hot tub assembly can include a base pedestal and flexible liner for creating a desired seating configuration within a portable hot tub. The base pedestal can comprise a ring-like design wherein the ring can function as a seat while an inner portion can function as a foot well. The base pedestal can further function so as to increase the overall capacity or volume of the portable hot tub. The base pedestal can comprise a number of molded seats as part of the ring so as to define a comfortable seating arrangement. The base pedestal and flexible liner can be provided in kit form for converting an existing flat-bottomed portable hot tub into a portable hot tub assembly with seating features.