The astronauts had personal preference kits (PPKs), small bags containing personal items of significance they wanted to take with them on the mission.
ðɪ ˈæstɹənˌɔːts hæd pˈɜːsənəl pɹˈɛfɹəns kˈɪts pˌiːpˌiːkˌeɪˈɛs, smˈɔːl bˈæɡz kəntˈeɪnɪŋ pˈɜːsənəl ˈaɪɾəmz ʌv sɪɡnˈɪfɪkəns ðeɪ wˈɔntᵻd tə tˈeɪk wɪð ðˌɛm ɔnðə mˈɪʃən.