A convertible carrier includes first and second carrier units (101A, 101B). The first carrier unit includes a first side panel (114A) and a first medial panel (110A) disposed opposed to the first side panel. The second carrier unit includes a second side panel (114B) and a second medial panel (110B) disposed opposed to the second side panel. The first and second medial panels are in a face-contacting arrangement to form a medial wall disposed between the first and second side panels. The first and second medial panels are retained in the face-contacting arrangement by at least one hinged connection (149, 161) between the first and second medial panels and by at least one removable joint. The removable joint is formed in part from part (162A) of the first medial panel and in part (162B) from part of the second medial panel.