A method of packaging a two component composition into a dual vial (100), wherein the dual vial (100) comprises a single continuous piece of material arranged to provide both a first vial (110) and a second vial (120), the method comprising providing a second component of the composition into a volume, of the second vial (120), surrounding the first vial (110), providing a first component of the composition into a first vial (110), wherein the first vial (110) is nested within a second vial (120), and closing the first vial (110) and the second vial (120).