The disclosed pack and go bathtub liner forms a barrier between a user and the surfaces of a bathtub, is reusable, washable and covers all surfaces of a bathtub. The pack and go bathtub liner is fabricated from a non-toxic, anti-microbial, waterproof material that defines a watertight volume within a separate from a bathtub. The liner is packable into an easily transportable package. The pack and go bathtub liner provides a barrier to contaminants that may exist within a bathtub and prevents contact with a person or children within the bathtub to provide peace of mind to parents wary of the cleanliness of unfamiliar bathtubs.