If you were to go up to space for a few years and you were only allowed to bring one item with you what would it be?

Question: If you were to go up to space for a few years and you were only allowed to bring one item with you what would it be?
- Keywords:
  item,
  space,
  year
Asked by hazel17 to Dominic, James, Jenny, Kevin, Norah on 13 Mar 2017.
- Dominic Doyle answered on 13 Mar 2017:
  
  Clean underwear!
  No, seriously, taking that for granted, I’d take by smart phone, with enough music, memory and a good camera so I could record my experiences and relax with good music

Question: If you were to go up to space for a few years and you were only allowed to bring one item with you what would it be?